Answer:
Metaphors: His voice was a cannon shot in the silence. Dad is as strong as an ox. She sings like a bird .
Similes: My brother is a couch potato these days. My best friend holds me up like a rock .
Step-by-step explanation:
Both the metaphor and the simile are figures of speech that promote subjective comparisons between two elements in the same sentence, however these comparisons have different relationships. The comparisons formed by the metaphor, relate two terms that have something in common, where one "lends" its meaning to the other term. The simile, however, makes comparisons between two terms that have nothing in common, but that can present a new meaning to this relationship between them.