Question

multiple - choice question
what creates the typical smell of marshes?
sulphur
hydrogen sulfide
hydrogen phosphate
eggs
rewatch
submit

Explanation:

In marshes, anaerobic bacteria break down organic matter, producing hydrogen sulfide which has a characteristic "rotten - egg" smell and is responsible for the typical marsh smell. Sulphur alone doesn't create the smell, hydrogen phosphate is not related to the smell, and while eggs have hydrogen sulfide which smells similar, it's not what creates the marsh smell.

Answer:

B. Hydrogen sulfide