Theory:

Popular Dances of India:
In ancient times, dance was considered as a way to celebrate, worship and also as a gesture of thanksgiving and joy. Dances of India reflect its cultural richness.
 
Folk dances of India:
  
State
Popular dance
Tamil Nadu
Karagattam, Oyillattam, Kummi, Therukoothu,
Bommalattam, Puliattam, Kolattam, Thappattam
Kerala
Theyyam and Mohiniattam
Punjab
Bhangra
Gujarat
Garba and Dandia
Rajasthan
Kalbelia and Ghoomer
Uttar Pradesh
Raaslila and Chholiya
Assam
Bihu
Jammu and Kashmir
Dumhal
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Dances - India

Unity in Diversity:
The spirit of patriotism unites India despite all these diversities. Symbols such as the National Flag and National Anthem remind us of our great nation. Celebration of landmark events such as Independence Day, Republic Day and Gandhi Jayanthi every year brings us together and keeps the spirit of one nation alive within us.
India has evolved as a single nation through common beliefs, customs and cultural practices. Our spirit of unity is seen in our freedom struggle and the drafting of our Constitution of India.
Important!
India is known for ‘unity in diversity’. This phrase was coined by Jawaharlal Nehru, the first Prime Minister of independent India, in his book Discovery of India.
 
V.A. Smith called India as an ‘Ethnological museum’, as a great variety of racial types exist.