Which sentence correctly defines a simile?

It is a figurative saying or message that teaches a lesson.
It is a figurative saying or message that teaches a lesson.

Similes are words that appeal to the five senses.
Similes are words that appeal to the five senses.

It is a type of figurative language that uses like or as to compare two unlike things.
It is a type of figurative language that uses , like, or , as, to compare two unlike things.

Similes are words like pear and pair that sound the same but have different meanings.