The answer is burning coal! Please forgive me if I get this answer wrong!
Answer:
The evidence from the eruption helps scientists study past climate changes and compare them to modern changes.
Explanation:
Essentially, they like to study an area of difference so that they can see what changes in that situation; and they are able to understand <em>what </em> would change in a study sample (letting them know what measures to look for)
Answer:
1 Both processes occur during asexual reproduction.
Explanation:
It's the answer that makes the most sense.
Description 2 describes a commensal symbiosis. The answer is D, commensalism.