PART A: In paragraph 4, how does the author's use of "crumples," "buckles," "crashed," and "mash-up" impact the reader's
understanding of convergent boundaries?
A by helping the reader understand how to locate the convergent
boundaries
B by helping the reader to imagine the violent movement
associated with convergent boundaries
C by providing the reader with a comparison between convergent
and divergent boundaries
D by illustrating for the reader the differences between convergent
boundaries and transform boundaries

B. by helping the reader to imagine the violent movement  associated with convergent boundaries

Explanation:

The words "crumples,"  "buckles," "crashed," and "mash-up" are all descriptive words that when read, help the reader to visualize the subjects being acted on by these verbs.

In this scenario therefore, the author put these words so that the reader can imagine just how violent it can get when convergent boundaries move and meet without the reader needing to actually see it because these words when used on objects, serve to describe a certain level of destruction.

- "the die is cast; i have consented to return if we are not destroyed. thus are my hopes blasted by cowardice and indecision; i come back ignorant and disappointed. it requires more philosophy than i possess to bear this injustice with patience. i have lost my hopes of utility and glory; i have lost my friend."

the answer is b. the tracer looks harmless in flight, but the pilot’s bitten lips and white knuckles suggest how dangerous it can be.