Theory:

Understanding Diversity
The differences in race, religion, caste and environment etc., are known as diversity, for example take a look at a classroom of a school, each and every student in the class are not the same, they are all entirely different from each other in the basis of Religion, caste, race, physique, food habits, languages and festivals etc. Similarly, we Indians are living in different states with different geographical locations, cultures, religious belief and practices, festivals etc
Diversity in India
India’s culture is unique and one of the oldest (5000 Years) in the world. In the world only a few countries have the same kind of cultural diversity and long history that India. There is an astounding cultural diversity across the country. Since ancient times until recently there were different groups of people from Central, East Asia and Western worlds coming to India in the interest of its wealth.  Some invaded and few others came in business interest. Thus people having varying social, religious, racial backgrounds, settled in India and enriched India’s diversity.
Social Diversity
Although India is one nation, she has a plural society. Its plurality is built in its demographic, economic, historic, geographical, political, and socio-cultural base. Within the national identity of Indian, numerous local and regional identities are surviving.
Interdependence and Co-existence
Community can be defined as a social unit pertaining to a geographical area where people have common Cultural, Social, and religious belief, customs and values. Every community is made up of different types of skilled and unskilled labourers like Doctor, Engineer, farmer, Artisan, goldsmith, teacher, washer man etc. When we live in a society we need not necessarily learn how to construct a building, grow paddy, repair a machine and to treat an illness etc., instead our complex social system will take care of it. It means everyone from the society will help each other with their seasoned unique skill which is called interdependence and co-existence.
Family and Society
Family is a basic and important unit of a society. There is an inseparable tie between family and society. According to Indian scenario families fall under two Categories namely: 
  • Nuclear Family: includes a husband, a wife and their children.
  • Joint Family: includes two or more generations of kin.
Families live in peace and harmony in the neighbourhoods, in Villages, and cities. Though there are many differences, the interdependence for amenities like food, water, education, dress, etc., and essential services made us live in harmonic society.
Religious Diversity
Religion in India has never been static, there are many religions originated in Indian subcontinent such as Hinduism, Buddhism, Jainism, and Sikhism apart from the other religions such as Islam, Christianity, Zoroastrianism etc., are also nourished in India.
 
Indian constitution declared that India is a secular country and all religions must be treated on equal terms. Our constitution also ensured that all religious groups could freely perform their beliefs and rituals.  Unquestionably India is a land of festivals. There are festivals for every region, every religious place, for every season and for every legend & myth.
 
Religious diversity of India can be understandable from the festivals Indians celebrate, for instance, AyudhaPuja, Vijayadhasami, Navaratri, Durga Puja, Deepavali,  Dussehra, Ganesh Chaturthi, Bihu, Kumbamela, Mahavir Jayanthi, Guru Nanak Jayanthi, Buddha Poornima, Moharam, Ramzan, Christmas etc.
 
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Deepawali
 
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Ramzan
 
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Christmas
Cultural Diversity
Culture refers to a collective term which encompasses religion, food, language, social habits, music, art, architecture and many other things. The role of Art and architecture are never separable from any culture. There are many distinct ways of artistic expression were developed and followed by each and every States and Union Territory of India. The same way tradition is also distinct across the country.
Popular Dances of India
Dance and music are essential parts of any culture. It is part of our culture since prehistoric times, for instance scenes of cave paintings belong to the earliest Paleolithic and Neolithic period found at Bhimbetka rock shelters in Madhya Pradesh and artefacts found at Indus Valley archaeological sites.
 
Dance is performed in all occasions like ceremony, rituals, entertainments, thanks giving, etc.  Dances can be classified into two types: Classical Dance and Folk Dance.
 
Classical dance of India includes Kathak – Uttar Pradesh, Sattriya – Assam, Manipuri – Manipur, Odissi – Odisha, Kuchipudi – Andhra Pradesh, Bharatanatyam – Tamil Nadu, Kathakali – Kerala, Yakshagana – Karnataka.
 
Folk Dances of India are given below:
 
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Unity in Diversity
The state of togetherness or oneness in-spite of the presence of immense diversity is termed as “Unity in diversity”. Although there is immense diversity in India, but the sense of being “Indian” overrides and dominates the differences. Celebrations such as Independence Day, Republic Day and Gandhi Jayanthi and Symbols like Ashok Chakra, National Flag and national anthem ignites the need for togetherness and unity.