Respuesta :
I think the answer is A. because all organisms depend on other things whether they are biotic or not.
Answer:A.Elements of ecosystems are mutually dependent on each other.
Explanation:
Elements of ecosystem include biotic and abiotic factors which are dependent on each other mutually. The biotic factors are dependent on abiotic factors and viceversa. For example, the plants respire and produce carbon dioxide gas which becomes the part of atmosphere. Also, in photosynthesis of plants produces water and oxygen. The water is an essential abiotic element and oxygen becomes the part of air.