In the 1800s humans hunted elephant seals in the arctic. At one point, the wild
population of seals was reduced to only 20 individuals, greatly reducing the gene
pool.
As elephant seals have reproduced and recovered from danger, this sudden
shrinkage of the gene pool would be classified as __
O A catastrophic event
O A bottleneck event
A mutation event
The founder's effect

A bottleneck event.

Explanation:

A population bottleneck is an event that drastically reduces the size of a population. The bottleneck may be caused by various events, such as an environmental disaster, the hunting of a species to the point of extinction, or habitat destruction that results in the deaths of organisms.

Hope this helps!

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !