Answer: Full Moon
Explanation: The Earth blocks the sunlight radiated for the Moon, so parts of the moon would be shadowed by the earth as seen by people. You do actually, see the entire phase of the round ball during a Full Moon. It is during when the Earth's orbital plane is inclined, or angled, by a few degrees from the ecliptic plane, meaning the Earth doesn’t block its sunlight during this time.
Hope it helps! You can refer to the website for more: https://www.quora.com/Why-do-we-see-a-%E2%80%98full-Moon%E2%80%99-if-the-Earth-blocks-the-light-from-the-Sun
