Thechemically changes food molecules into energy. Nucleus

Chloroplast

Mitochondria

Cell Membrane

(This is 7th grade science).

It's the mitochondria.

Explanation:

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.

and after water is usually warmed by the sun the water temperature raises and then evaporates .