Answer:
One reason, it causes global warming
Explanation:
It is a major source of carbon dioxide when it burns.Furthermore, the ash coal produces makes it impossible to get things clean.
Correct me if i'm wrong i think the best answer would be d. the cow uses all of the corn's energy for life processes.
Answer:
it's 2
I don't know how to explain but yeah its 2
I believe the answer would be d