Answer:
B and C
Explanation:
B: The Earth casts a shadow on the Moon.
Reference: NASA's website
The moonlight we see on Earth is sunlight reflected off the Moon's grayish-white surface. The amount of Moon we see changes over the month — lunar phases — because the Moon orbits Earth and Earth orbits the Sun. During a lunar eclipse, Earth comes between the Sun and the Moon, blocking the sunlight falling on the Moon. Earth's shadow covers all or part of the lunar surface.
C: The Moon's position relative to Earth results in phases.
The phase of the moon we see depends on where the Earth is relative to the Moon and the Sun. When the Moon is between the Earth and Sun, the surface of the moon that is lit up is not facing us, so we can’t see the moon at all (referred to as the new moon). When the Earth is between the Moon and Sun, the Sun’s light bounces off the surface of the moon and the moon is completely lit up as seen from earth (this is called the full moon). When the Moon is between those two positions, we see the first and third quarter.
