How does the narrative technique of characterization support the authors purpose in this excerpt

it does by telling us about the various Characters and the different styles and various concepts of his character developement

I am unsure if this is correct, but here is the full possible question:

Read the excerpt from Enrique’s Journey.

Before the train leaves, the gangsters roam the Tapachula depot, eyeing which migrants are buying food and where they stash their cash afterward. They try to get friendly with the migrants, telling them they have already done the train ride. Maybe they can offer tips? Many of the gangsters wear white plastic rosaries around their necks so the migrants will be less suspicious. They ask, "Where are you from? Where are you going? Do you have any money?"

How does the narrative technique of characterization support the author’s purpose in this excerpt?

O It helps create uneasiness.

O It helps create trust.

O It helps create hope.

O It helps create calmness.

The answer to this question is It helps create uneasiness.  (1st option).