Answer: D. a genetic bottleneck
Explanation:
A genetic bottleneck also known as a population bottleneck is one that describes a sharp reduction in the size of a population caused by environmental events like in the above or caused by human activities.
B E D hehsbshajshajsbsbhs sorry if its wrong but i rember doing this lol
I'd have to go with the first option, stags have more prominent antlers than does