While performing strenuous exercise, a person may experience a temporary shortage of oxygen. As a result, anaerobic respiration supplies the required energy.
What is an end product that will build up in the person's muscles?

A. ethyl alcohol
B. glucose
C. lactic acid
D. pyruvate

C. lactic acid

Explanation:

"Lactic acid" build-up in the muscles occur when a person does an "anaerobic exercise," specifically high-intensity ones. Due to lack of oxygen going to the muscles (temporary), "glycolysis" occurs. This means that glucose will be used in order to provide the energy needed. This process produces lactic acid as an end-product. This makes the muscles "sore," thus, it is important to have rests per week in order to eliminate lactic acid.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: