Choose the correct option:
Simile: As cool as a _______.

As cool as a cucumber (PHRASE):
Meaning:
1. Untroubled by heat or exertion.
2. Calm and relaxed.

If someone is as cool as a cucumber, they are very relaxed, calm, and unemotional.
Ex: She was as cool as a cucumber.
A simile is a figure of speech in which two essentially dissimilar objects or concepts are expressly compared with one another through the use of “like” or “as.”
So, the Simile is: As cool as a cucumber.