What is formed when meteoroids collide with the moon's surface?
a. basalt
b. maria
c. impact craters
d. volatile elements

The correct answer is letter C. Impact craters are formed when meteoroids collide with the Moon's surface. Moon is lacking with water, atmosphere and tectonic plates. Because of these, there is no or little erosion and made the craters stay for a longer time. Bigger craters with smaller craters inside is considered to be old.

Answer they are produced by collision of tectonic plates;

Answer volcanic outgassing;