The dichotomous key (ERGENT HELP) A

helps classify organisms through yes or no questions.

B

unlocks the names of different organisms in a family.

C

groups animals that lay eggs with animals that have live births.

D

asks multiple questions about how organisms behave and act.

D. asks multiple questions about how organisms behave and act.

the sunflower because each experiment got the same results

hope this !

-payshence

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.