Kids from last year who came back to visit humphrey didn’t like their new teacher ms becker why not?

She/He might not be used to the teacher.

Explanation:

themselves

an intensive pronoun is a pronoun that ends in self or selves, such as himself, herself, themselves, yourself, ourselves. since band members is a third person plural, the correct intensive pronoun would be themselves. if the band was talked about as a collective noun, itself would be the appropriate intensive pronoun. intensive pronouns are used to add emphasis to the noun it's modifying which is why it directly follows it.

showing or suffering from nervousness, fear, or a lack of confidence