Answer:
The first choice.
Step-by-step explanation:
When using indirect characterization, an author does not state direct facts about a person's character, but rather describes the personality through verbal actions and gestures.
Selma keeping her eyes glue to the ground tells us that she is somewhat timid. Knowing that she avoids eye contact completely, even when someone talks to her, lets us know that Selma is shy to an extreme and perhaps antisocial.