Which human activity negatively affects the stability of the environment?
a. riding bicycles
o
b. planting trees
o
c. recycling paper
o
d. cutting down all trees in a forest

D.Cutting down all trees in a forest

Explanation:

The environment is being hurt everyday by the people who live in it. Without trees there is no oxygen and when there is no oxygen there is no humans. Stop Cutting Down Trees

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.