why does the border between light and dark on the moon change location?

why does the border between light and dark on the moon change location?

why does the border between light and dark on the moon change location?

Answer

Brief Explanations:

The Moon orbits the Earth and the Earth - Moon system orbits the Sun. As these motions occur, the angle at which sunlight hits the Moon changes. This causes the boundary between the illuminated (light) and non - illuminated (dark) parts of the Moon to shift.

Answer:

The boundary between light and dark on the Moon changes location because of the Moon's orbit around the Earth and the Earth - Moon system's orbit around the Sun, which alters the angle of sunlight hitting the Moon.