Question

Which one tells why scientists want to study solar eclipses?

A) The moon casts a shadow. It falls on Earth.
B) A solar eclipse happens when the moon passes between the sun and Earth.
C) The moon almost fully blocked the sun.
D) But during solar eclipses, scientists can study the sun's corona.

Answer 1

D. During the solar eclipse scientists can study the earth corona

Answer 2

The correct answer is:  [D]:
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  "But during solar eclipses, scientists can study the sun's corona."
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    Note:  Refer to the third paragraph of the article.  The sun is usually difficult to study.   When the sun's corona (which is hotter than the sun's surface) becomes available to study, scientists have a better opportunity to study the corona and try to determine why the corona is hotter than the sun's surface (among other matters).
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