Question

a full moon occurs when the illuminated side of the moon is fully visible from earth. how are the earth, moon, and sun arranged for this to happen?

Explanation:

The Moon's illumination comes from the Sun. For the fully illuminated side of the Moon to be visible from Earth, the Earth must be positioned between the Sun and the Moon. This alignment allows sunlight to reflect off the entire near - side of the Moon (the side facing Earth) as seen from our planet.

Answer:

The Earth is between the Sun and the Moon.