During strenuous exercise, oxygen used in atp production can become depleted. how would the muscle cells respond to the lack of oxygen?

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.