The theme of a story refers to its

protagonist
main events
moral
main message

The theme of a story refers to its main message.

A theme is the core message of a story and is usually revealed through the characters, the plot, the setting or the narrative techniques used by the author.

The theme is developed throughout a story, and it is often identifiable with clarity at the resolution.

rivalry

explanation:

since it is asking for her reaction to elnora's trouble at school you can rule out any answers with a positive response (b). then you can rule out (d), this is because it does not show the mother's reaction but the daughter's response. that leaves you with two options (a) and (c), by looking at the options you can rule out (c) because it isn't referring back to elnora's issues at school.