Question

we can see the moon because it's reflect from the sun give reason

Answer 1

The side lit by the Sun is always the side that is pointed toward the Sun, as seen in the diagram below on the left. We only see the Moon because sunlight reflects back to us from its surface. During the course of a month, the Moon circles once around the Earth.

Answer 2

The moon shines because its surface reflects light from the sun. And despite the fact that it sometimes seems to shine very brightly, the moon reflects only between 3 and 12 percent of the sunlight that hits it