The correct answers are A) an observer in the Moon sees a solar eclipse, and D) an observer form the Earth sees a lunar eclipse.
In the diagram, the Sun, the Earth and the Moon are in perfect alignment. The two conclusions that can be drawn based on the diagram are: an observer in the Moon sees a solar eclipse, and an observer form the Earth sees a lunar eclipse.
A solar eclipse occurs when the moon passes exactly between the Sun and the Earth and cast a shadow over a portion of the Earth. A lunar eclipse occurs when the Earth passes exactly between the Sun and the Moon, blocking the sunlight.
