Answer:
ecological succession.
Explanation:
The plant may not be present in 25-50 years due to ecological succession. in ecological succession, the vegetation such as small plants that is present replaces by the more suitable vegetation such as trees because the vegetation (small plants) did not receive nutrients and sunlight so they are unable to grow and finally dies due to lack of basic needs. So that's why plant may not be present 25-50 years.
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.
