Which of the following sentences contains a linking verb?

The mountain climber felt for a foothold.
Jennifer tasted the spaghetti.
Michael grew tired of the arguing.
He just looked at me I’m confusion.***
Hi plz help me I’ve been on this assignment for days now plz check my answer

Hi sorry for the last one it’s not supposed to say he just looked at me I’m confusion it’s supposed to say he just looked at me IN confusion