Which of the following statements characterizes an excitatory neuron? it sends an impulse back to the cell body of a neuron. it carry an impulse to the next neuron. it stops the passage of an impulse at a neuron.

It sends an impulse back to the cell body of a neuron

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.