<span>for example, forests help the environment by soaking up carbon dioxide, conserving soil, and preventing flooding.</span>
I think it might be D I’m not sure
The answer would be the fourth one because MLA goes last name first name name of book where printed printing company date and what type
What you picked sounds about right!
"No one knows everything about the brain" would be a correct sentence, but that is me taking out the "they" part, do you need me change it differently, or is this answer good?