Final answer:
Simile
Step-by-step explanation:
The sentence "His face was as red as a beet" is an example of simile. Simile is a figure of speech that compares two things using the words 'like' or 'as'. In this case, the redness of the person's face is being compared to the color of a beet. It helps to create a vivid image of the person's red face.
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