How does the appearance of each phase of the moon related in Moon's position relative to earth and the sun?

The appearance of each phase of the moon is determined by its position relative to Earth and the Sun. During the New Moon phase, the moon is between Earth and the Sun, making it invisible from Earth. As the moon orbits Earth, more of its illuminated side becomes visible, leading to the Waxing Crescent, First Quarter, Waxing Gibbous, and finally the Full Moon when it is on the opposite side of Earth from the Sun. After the Full Moon, the phases reverse as the moon moves back toward the New Moon position, transitioning through the Waning Gibbous, Last Quarter, and Waning Crescent phases.