Everything that is said has mostly to deal with a tree, so that is why they used a tree for the image.
I think the answer is A)He combines details and indisputable facts with hyperbole and understatement to demonstrate the complexities of attempting to unify forces in order to promote change among opposing groups of citizens.
but I am not 100% sure since I have not read "Letter from a Birmingham Jail" in a couple of years.
A scientific article on the benefits of community service is the correct answer :) All the others are irrelevant or too old.