The phases of the Moon are a result of which of the following?

A.
the Moon's orbit around the Sun

B.
the Moon's orbit around Earth

C.
Earth's orbit around the Moon

D.
Earth's orbit around the Sun

B. the Moon's orbit around Earth

The correct answer is B. The phases of the Moon are a result of the Moon's orbit around Earth.

The correct answer is B. The phases of the Moon are a result of the Moon's orbit around Earth. The Moon does not produce its own light; rather, it reflects sunlight. As the Moon orbits around Earth, the positions of the Moon, Earth, and Sun create different angles of illumination on the Moon's surface. This changing illumination causes the Moon's appearance to cycle through different phases, such as new moon, first quarter, full moon, and last quarter. To determine the phases of the Moon, one can observe the Moon's position relative to Earth over a period of time or refer to a lunar calendar or smartphone app that tracks the Moon's phases.