The answer is d. A large asteroid or comet impacted the Eartg
C. Commensalism
"An association between two organisms in which one benefits and the other derives neither benefit nor harm."
Answer:
Sorry if I'm wrong but I think it's B
Explanation:
A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes, floods, fires, disease, and droughts or human activities such as specicide and human population planning.
