Question

came happy boys,like a flock of sheep(write figure of speech,)

Answer 1

There is simile example 'like'

Answer 2

The figure of speech in came happy boys, like a flock of sheep is Simile.

The reason is the use of the word like in the sentence.

Similes are those figures of speech that involve a comparison between two unique things that come from a completely different background or have an entirely different meaning.