The correct answer is: A. 1/40th.
The moon’s volume is about 1/40th that of Earth. This means that if you were to take a sphere of water the size of Earth, and then take a sphere of water the size of the moon, the moon’s sphere would be about 1/40th as big.
The moon is much smaller than Earth, but it is also much closer to Earth. This means that the moon’s gravity has a significant effect on Earth, and it is responsible for the tides.
The moon is also tidally locked to Earth, which means that the same side of the moon always faces Earth. This is because the moon’s rotation period is the same as its orbital period.
The moon is a very important part of Earth’s system, and it has played a significant role in the evolution of life on Earth.