Equinox occurs when the sun is vertically above             .

A. Tropic of Capricorn
B. Tropic of Cancer
C. Poles
D. Equator
Answer» D. Equator
Explanation: An equinox is an astronomical event in which the plane of Earth's equator passes through the center of the Sun, which occurs twice each year, around 20 March and 23 September. The equinoxes are the only times when the Sun is exactly overhead at a point on the equatorial line. On an equinox, day and night are of approximately equal duration all over the planet.
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