What Literary term is this quote Lennie covered his face with huge paws and bleated terror?

This quote uses a literary device called zoomorphism.

Zoomorphism is the attribution of animal characteristics to a human or inanimate object. In this example, Lennie, a human character, is described as covering his face with "huge paws" and "bleating terror". This comparison to an animal (specifically, a large mammal like a bear or dog) emphasizes his vulnerability and fear.