Oxygen (Step 1:takes in carbon dioxide. Step 2:releases oxygen)
Why can't plants and animals not leave what alone? Or do you mean why can humans leave them alone? Because the answer to that question is, "no one knows".
Transpiration.
Transporation.
Study leave.
the seeds fly away
The plants stomata
the light leaves the plants by the Chlorophyll
yes but he did leave
Plants
They actually lose the nutrients
Dinosaurs
Worms eat the soil and leave their feces which are full of neutreants, which a plants root soak up.