Are you attending laurel springs school? if so I GO THERE !!!!! I need the same help :) I know one of them was pollution
Answer: D
Explanation:
Ensuring that they don't lose their habitat and protecting them is key. Not adding in other invasive species or overexploitation. Conserving would cut the pollution (and if done globally it would cut back global warming). So if we protect the current species more will come or the current will evolve and be able to reproduce.
I Think It Has To Do With The Mass & What Makes The Object The Object