Question

what is the term used to describe the changing shape of the moon as it orbits earth?
options: phase, orbit, eclipse

Explanation:

The question is about the term for the changing shape of the Moon as it orbits Earth. "Phase" refers to the different appearances of the Moon due to its position relative to Earth and the Sun. "Orbit" is the path of the Moon around Earth, and "Eclipse" is when the Moon or Sun is obscured. So the correct term is phase.

Answer:

A. phase