How can the bell curve graph of variation change in response to changes in the environment?

answer; i believe that the correct answer is (lung);

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.

ya the other dude is right