A Lunar Eclipse occurs when the Moon does what?

A lunar eclipse occurs when the Moon enters the Earth's shadow. This happens specifically during a full moon when the Sun, Earth, and Moon are aligned in a straight line, with the Earth positioned directly between the Sun and the Moon. As the Earth blocks sunlight from reaching the Moon, the Moon can appear to take on a reddish color due to Rayleigh scattering of sunlight through the Earth’s atmosphere, a phenomenon often referred to as a "blood moon."

The other options do not accurately describe the conditions for a lunar eclipse. The Moon being between the Earth and the Sun describes a solar eclipse, while the Moon being in full view from Earth pertains to its regular phase during a full moon but doesn't indicate an eclipse. Lastly, the Moon's revolution around the Earth is part of its orbital dynamics but does not explain the occurrence of a lunar eclipse.