If one were to improve the diction, or word choice, of the phrase a big reason in sentence (6), all of these would maintain the style except a) "a driving force." b) "a huge incentive." c) "a proper stimulus." d) "a large motivation."

C) "a proper stimulus."

Explanation:

A driving force is used to express that someone has a big motivation or a big reason to do something, as well as a huge incentive, or a large motivation, it is used to express that someone has big willing on doing something, a proper stimulus is a motivation that is not necesarily big or smal, it´s just enough to make the person do the thing he has to do.

the author is intending to draw attention to the plight of refugees, editorial and biography support this. both workpieces make the reader empathize with enrique as well as with the other young migrants from central america. the writer, however, is using a different approach to each text.

the editorial includes strong words to persuade readers. he is trying hard to convince readers in the us to change its refugee approach.

the biography relies on narrative techniques and figurative language which the writer uses wisely in the setting, characterization, and personification to educate readers on the topic.