Question

what is fermentation?
a series of reactions, occurring in the presence of sunlight,
that creates glucose, or sugar
a series of reactions, occurring in the presence of oxygen,
by which glucose is broken down to create atp
a chemical process, occurring without oxygen, by which
glucose is broken down to create atp
the set of chemical reactions that occur in living
organisms in order to maintain life

Explanation:

Fermentation is an anaerobic (without oxygen) process. It is a series of reactions where glucose is broken down. The key here is that it occurs without oxygen.

Answer:

A chemical process, occurring without oxygen, by which glucose is broken down to create ATP.