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.
probably younger.----less sediment would mean less time.
I see half of it and what are you working on?
It just depends what you are studing:
The answer is D) proteins
