Dr. Amiya Chakravarthy is known for his work in the Chipko movement. The Chipko movement was a nonviolent resistance movement that started in India in the 1970s. The movement was against the deforestation of the Himalayan forests. The movement was led by women who hugged the trees to prevent them from being cut down. The movement was successful in stopping the deforestation and it is considered to be one of the most successful environmental movements in history.
Option A is incorrect because Dr. Amiya Chakravarthy is not known for his work in the Chipko movement.
Option B is incorrect because Dr. Amiya Chakravarthy is not known for composing music for Ray’s films.
Option C is incorrect because Dr. Amiya Chakravarthy is not known for being literary Secretary to R. N. Tagore.
Option D is incorrect because Dr. Amiya Chakravarthy is not known for patenting a living organism.