Concept:A lunar eclipse occurs when the Earth blocks sunlight from reaching the Moon.
Explanation:The Moon shines only by reflecting sunlight.
An eclipse of the Moon happens when the Sun, Earth, and Moon are aligned in a straight line.
In this alignment, the Earth lies exactly between the Sun and the Moon.
The Earth then casts its shadow on the Moon, making the Moon appear dark.
Thus, a lunar eclipse occurs when the Earth comes between the Sun and the Moon.
Answer:Option A: When the earth comes between the sun and the moon