Answer:
Metaphor
Step-by-step explanation:
A metaphor is a literary device used to compare two things that aren't alike but do have something in common. Unlike the simile, which is a more direct comparison, the metaphor doesn't involve the use of words like and as. It states that something is something else.
In the given example, Keisha said that Terry is quite a butterfly. She doesn't literally mean that he is a butterfly. What she has in mind is that he is very social. People like Terry are often described as social butterflies.