Too much carbon dioxide in your blood can harm your body's organs. Both of these problems—a low oxygen level and a high carbon dioxide level in the blood—can occur at the same time. Diseases and conditions that affect your breathing can cause respiratory failure. So choose option c) carbon builds up in the body .
Human activity can affect the amount of carbon in the atmosphere. When fossil fuels like oil, coal, and natural gas are burned, carbon dioxide is released into the atmosphere as waste.