A biology teacher gives each pair of students in her class a group of 30 newly sprouted bean plants. She tells the class to design and carry out an experiment with these plants. After one month, the students compile the data shown below.

I think It's D

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.