Correct Answer: A. G. Tansley

Solution : The correct option is A. G. Tansley .

The term ecosystem was proposed by Sir Arthur Tansley, a British botanist and ecologist, in 1935. In addition to coining the term, Tansley made several significant contributions to ecology, including developing the concept of the ecosystem to describe the interactions between living organisms and their physical environment. He also worked on the classification of vegetation and the study of plant communities.