What type of figurative language is mountains out mole hills?

The phrase "making mountains out of molehills" is an example of a metaphor.

Here's why:

* Metaphor: A figure of speech that directly compares two unlike things without using words like "like" or "as". In this case, "mountains" (something large and imposing) are being compared to "molehills" (something small and insignificant).

The phrase highlights how people sometimes exaggerate small problems or issues, making them seem much bigger than they actually are.