The change to an ecosystem that is brought about by the biotic factors is the the landslide caused by the cattle overgrazing. The answer is letter C. The word biotic means the factor should be living thing (s). Among the choices, only the cattle is living organism.
Lots of bad experiences are going on in Mexico right now, I went there to go see mi familia and was worried about dying. Lol but I’m back in the USA and I’m fine.