Question

what is mean by subset​

Answer 1

Answer:

A subset of a group of things is a smaller number of things that belong together within that group.

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Answer 2

Answer:

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do you mean sunset

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$<space></p><p>The time of sunset is defined in astronomy as the moment when the upper limb of the Sun disappears below the horizon. ... Night occurs when the Sun reaches 18 degrees below the horizon and no longer illuminates the sky.</p><p>$