Read this excerpt from "The Piñata"

My mother sent me to his home every day in the summer to keep him company. "He has no one," she'd say, "since your nana passed."
He never said much to me. He only gave gruff instructions in broken English and a complaint here and there about how I didn't know Spanish. It was my second summer with him, and I could see why he was always alone.

Why is the narrator telling this tale?

to criticize his family's business practices
to describe his relationship with his grandfather
to illustrate the differences between two cultures
to explain a summer employment experience