Your answer is going to be the second choice.
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Answer:
The noun phrase that completes the sentence is A. , a relatively rare event,: <em>A total solar eclipse, a relatively rare event, causes a change in the amount of visible light.</em>
Explanation:
A <u>noun phrase</u> is a group of words in a sentence that act together as a noun. In this way, the <u>noun phrase</u> can act as object, subject, prepositional object or apposition, like in this case. Therefore, option A is the correct answer.
The correct answer for E2020 is letter A) The words convey a sense of steady motion
The answer would be A, as the author is explicitly stating what the characteristics are, which is another way of being direct.