What is cellular respiration and why is it needed

Cellular respiration is a process that traits place in the mitochondrion of a cell. it is a cells way of producing energy. it is needed because without it your body wouldn't be able to perform any actions that needed energy, eventually leading to death.

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.

correct answer is a. and d.