Presence of inter-tropical convergence
Answer: They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth. ... Only when the Moon is crossing the plane of the Earth's orbit (the paper) just as it is lining up with the Earth and Sun will an eclipse occur.
Explanation:
The answer would be the 4th option. (Rainwater soaking into the ground). Soil erosion is commonly caused by rainwater soaking into the ground.
