Part A : D.
Reason- It is the only one that gives a proper judgment.
Part B: D.
Reason- It is the only option that goes with Part A.
I hope this helped :)
Soyunghoon Wang
Answer:
Healthy soil
Explanation:
Tropical areas have lots of rain and can help the soil and its minerals for plants compared to the Arctic where soil would freeze
I believe the answer is that under natural conditions oceans are self-cleaning systems.