Deforestation. The animals forest that they once lived in are bein cut down.
I think it the answer could be a "steamy mixture of carbon dioxide and water vapor".
The sunlight is not made by the plant or used by the plant. It is needed so it could get photosynthesis working and is not a part of the materials needed.
They teach us what happened in Earth before we arrived. For example, if we had never found any dinosaur fossils, we would have no idea what happened. Fossils show us ancient life and what it was like back then.
Please give me brainliest ^.^