Answer: Commensalism
Explanation: Well you can already eliminate parasitism because that is when an organism leeches off another. Mutualism is when one organism needs to depend on another compared to A where both are benefited. Then you can eliminate d because competition is when two organism compete with each other for survival not benefiting them both.
Answer: D. Current atmosphere CO2 levels would be increasing more slowly.
Explanation: A P E X
They are further classified into: fish, amphibians, birds, reptiles and mammals.
I hope I've helped : )
The answer is b Area A was completely underwater in the past.<span> None of the other conclusions can be drawn; you need more information. You DO know that area A was once completely underwater though.\</span>