Discussion

Explanation:

“As busy as a bee” indicates a comparison where being busy has been compared to the activities of a bee which are just as hectic. This figure of speech is a “simile” which means ‘something involving the comparison of one thing with another thing of a different kind, used to make a description more emphatic or vivid’.
A “metaphor” is also a form of comparison but ‘a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable’. In the given phrase, the comparison is explicit and not applied. This eliminates option 2.
An “oxymoron” is ‘a figure of speech in which apparently contradictory terms appear in conjunction’ and an “adage” is ‘a proverb or short statement expressing a general truth’. Eliminate options 1 and 3.
Hence, the correct answer is option 4.

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