The concept of ecosystem is attributed to:

The correct answer is (b). A.G. Tansley coined the term “ecosystem” in 1935. He defined an ecosystem as “the whole system (in the sense of physics) including not only the organisms but also the physical factors of the environment, with which they interact.”

(a) A.H. Strahler is a geographer who is known for his work on physical geography. He is not credited with coining the term “ecosystem.”

(c) C.C. Park is a botanist who is known for his work on plant ecology. He is not credited with coining the term “ecosystem.”

(d) F.R. Fosberg is a botanist who is known for his work on tropical botany. He is not credited with coining the term “ecosystem.”