The only logical answer in this question is D. If not than you could have done process of elimination. Animals eat plants and plants initially get energy from the sun. A is illogical because they are not the smallest organism. C isn't right since there aren't more of them. And in B they are never always all eliminated.
This is correct. Even the basic scientific theories get tested and checked time after time after time. The most basic example would be that people once thought the Earth was flat and now it changed and they believe it is round.
Explanation:
deforestation, watering, agriculture, mining
Answer:
wow! this a cumputer right?
