They are her best friends.
Meaning: This means that the animals are the most excellent or desirable people who have a close relationship based on mutual affection and trust with the female person.
Choice of Words: They is a third-person plural pronoun that refers to the animals. Are is a present tense verb that means to exist or to be. Her is a possessive adjective that indicates that something belongs to a female person. Best is an adjective that means the most excellent or desirable. Friends are people who have a close relationship based on mutual affection and trust.
Alternative Expressions
Related Expressions