In which process is lactic acid formed when there is not enough oxygen present for cellular respiration to take place?
a. photosystem i
b. atp synthase
c. fermentation
d. glycolysis

Fermentation

Explanation:

To find the correct answer, we will review over the definition of each answer choice.

Photosystem I is A membrane in a plant that produces high levels energy from light

Based on the definition, we can conclude that photosystem 1 is not the correct answer.

ATP Synthase are molecules that create ATP

We know that this answer choice is also not correct.

Glycolysis is the process of breaking down glucose to create energy.

Based on the definition provided we know that this answer choice is also incorrect

Fermentation is the process of lactic acid being formed when there is not enough oxygen present for cellular respiration to take place.

Therefore, fermentation is the correct term we are looking for.