Answer:
i wish there was an answer here i needed it
Answer:
The one major change that occurred was the placement and organization of the electron.
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.