Hi there!
The moon depends on the sun for light. Believe it or not, the Moon can't produce light of its own, so it relies on the sun to shine its light on one side of it. Isn't that cool?
Without the sun, the moon wouldn't have light, so we wouldn't be able to see, at night.
Neat, huh?
Hope this helps!
Message me if you need anything else! I'd be happy to help! :D