Concept:A solar eclipse happens when the Moon blocks the Sun's light from reaching the Earth.
Explanation:The Sun, the Moon, and the Earth must line up in a straight line.
The Moon is an opaque object, so it casts a shadow.
When the Moon comes directly between the Sun and the Earth, its shadow falls on the Earth.
This causes the Sun to appear partially or completely hidden from view.
Therefore, a solar eclipse occurs only when the Moon lies between the Sun and the Earth.
Answer:A. moon is between the sun and the earth