Question

What is the figure of speech of the waves rose mountain High​

Answer 1

The figure of speech used here is personification as roses are compared to as mountains

Answer 2

Hyperbole.

It is exaggerating the situation. In this sentence the figure of speech is hyperbole, which is when things are represented greater or lesser what they appear to be in reality.

So, the waves rose mountain high is an exaggeration.

Therefore, the figure of speech here is hyperbole because in reality this thing cannot happen and here the description is exaggerating the actual fact.