The mice in a house…………. afraid of the cat hold a meeting ……………. one proposes to tie a bell round the cat’s neck……… all agree ………… who is to bell the cat? No mouse offers………. the cat appears……….. all run away.

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.