Question

Alex ran as fast as a cheetah the sentence represents a

Answer 1

Simile (because you used "as") or hyperbole (because it is physically impossible for a human to run as fast as a cheetah, so this is an exaggeration)

Answer 2

The following sentence is a simile. A simile compares two things using the words “like” or “as. In this case, the author compares Alex to a cheetah when showing how fast he is. Hope this helped :))