Answer:
Sharp as a needle.
Explanation:
All the other sentences are describing the action. The only figurative speech is "Sharp as a needle." because it is used to empathize how sharp the pencil is. It is a simile, which is a form of figurative speech.
Simile: a figure of speech involving the comparison of one thing with another thing of a different kind, used to make a description more emphatic or vivid (e.g., as brave as a lion, crazy like a fox ). It is often a comparison using 'like' or 'as'.
Sharp as a needle.
