Question

Energy must be transformed in ecosystems because _______.

Answer 1

The answer is D, All of the above.

I took the test, and it said D was correct.

I hope this helps! Have a nice day :)

Answer 2

The answer is D.)All of the above. 
Its D because, energy can not be created or destroyed, all energy has to go somewhere. And an organisms energy must come from somewhere because you cant make it, its just there.