Answer:
There are many methods used by the scientists to study the change of earth's atmosphere and climate over the past million years. The study is called paleoclimatology. Since there are no measurement tools during those era, it studies the past by using proxy data. Proxy data includes earth's sediments, tree rings, historical archives, ice cores, and etc.
Explanation:
Your answer would be A. Phosphorus
Answer:
i think the first one, Kelp forest act as ecosystem engineers
Explanation:
if im wrong im sorry
