When humans and other animals lack sufficient oxygen, they'll create ATP through a form of anaerobic respiration that produces lactic acid as a byproduct. ... Yes 'Anaerobic' means 'without oxygen. Cells will produce ATP through lactic acid fermentation only under when they lack sufficient oxygen.
The answer for this is A.
the answer would be the third option: the cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
The answer to ur questions is heterotrophic
