I think the most suitable answer is carbohydrates as it can be monosaccharide, disaccharide or polysaccharide.
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.
The immediate lack of oxygen.
