Who among the following proposed the term ‘ecosystem’?

The correct answer is Option (1) – AG Tansely

The term "ecosystem" was proposed by A.G. Tansley. Arthur George Tansley, a British botanist and ecologist, introduced the concept of the ecosystem in 1935. He defined an ecosystem as a functional unit consisting of living organisms (biotic factors) interacting with their non-living environment (abiotic factors) in a particular area. Tansley's work laid the foundation for modern ecosystem ecology and our understanding of the complex relationships within ecological systems.