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Why do scientists study proteins to find evidence for evolution?

a) Proteins reflect DNA sequences, so scientists study proteins to look for genetic similarities and differences in organisms.
b) A lack or presence of proteins in an organism's body indicates whether the organism lives on land or in water.
c) Protein sequences never change, so scientists study proteins to discover how species of organisms evolve.

a) proteins reflect DNA sequences, so scientists study proteins to look for genetic similarities and differences in organisms.

Explanation:

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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.