“ball goes in (thwack) to mitt,/ and goes out (thwack) back to mitt.” this is an example of which sound device?

This is an example of Onomatopoeia

Explanation:

Onomatopoeia es the process in which the word and the pronunciation of it, phonetically imitates the sound of what it describes. Thwack is a short and loud sound of something hitting a surface, then this word imitates the sound of the action it is describing when it refers to the sound of the ball hitting the mitt back and forth.

you should probally put the sentences that you can choose from if you want me to you get 100%

the answer is something i don't know