Why do we see different phases of the lunar cycle?

"The half of the Moon that points toward the Sun looks bright because it is lit by sunlight. The Moon appears to change shape because we see different amounts of the lit part as the Moon orbits Earth. ... As it moves around Earth, more and more of the lit side comes into view."

A

Explanation:

i think it is dna, i'm not totally sure but i think it might be.