They use their skin to do gas exchange
"cutting down trees to build new buildings and roads", "factory and automotive emissions causing acid rain" and "redirecting and storing freshwater behind dams" exemplifies a way in which humans modify ecosystems. The correct option among all the options that are given in the question is the last option or the fourth option.
Answer:
b
Explanation:
all living things are made up of cells.
I believe it’s b but correct me if I’m wrong
