Read the excerpt from Enrique’s Journey. He was five years old when his mother left him. Now he is almost another person. In the window glass, he sees a battered young man, scrawny and disfigured.

It angers him, and it steels his determination to push northward.

Read the excerpt from "Children of the Drug Wars."

Children from Central America have been making that journey, often without their parents, for two decades. But lately something has changed, and the predictable flow has turned into an exodus. Three years ago, about 6,800 children were detained by United States immigration authorities and placed in federal custody; this year, as many as 90,000 children are expected to be picked up.
How do details from the excerpts support the author’s purpose?