Is released when molecules are being broken down.

a) carbon dioxide
b) carbon
c) sugar/glucose

Glucose is broken down in the presence of oxygen to produce carbon dioxide and water

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.

not too sure but maybe in the hot springs.