Theory:

Ajay exhibited his work and sold 144 out of the 150 paintings displayed. He continued to show his work throughout India, the United States and the United Kingdom. In 2004, Ajay was awarded a national award of accomplishment from the Indian President, Dr. A.P.J. Abdul Kalam.

Apart from painting, Ajay is also very actively involved in the welfare of people with hearing impairment in India and has been the executive member of the 'Deaf & Dumb Association' in Rajasthan. He also gives free training to hearing impaired children in Jaipur as well as children in an orphanage in Gandhi Nagar, Jaipur. One of Ajay’s current goals is to revitalise the dying art of traditional miniature Indian paintings.

Ajay’s life shows us that we can turn our hobby or passion into a successful career, if we are ready to learn and develop our skills.
Explanation:
 
Ajay displayed his artworks and sold 144 paintings out of 150 paintings that he displayed. He displayed his works not only in India but also throughout the United States and the United Kingdom. In 2004, Ajay received a National Award of Accomplishment from the then President Dr.A.P.J. Abdul Kalam.
  
Ajay also participates actively in the welfare of people with hearing disabilities. He has been the Executive member of the "Deaf and Dumb Association", Rajasthan. He trains hearing impaired children in Jaipur and in an orphanage in Gandhi Nagar, for free. Ajay aims to revive the dying art of traditional miniature Indian paintings.
 
There is an important lesson to learn from Ajay's life. It shows that our hobbies can be made into a successful career option if we are ready to learn and develop the skills.
  
Meanings of difficult words:
  
Word
Meaning
ExhibitedDisplayed/showed.
RevitalizeBring back to life.
Reference:
State Council of Educational Research and Training (2019). Term-1 English Standard-8. Hobby – Turns A Successful Career (pp. 77-94). Published by the Tamil Nadu Textbook and Educational Services Corporation.