The soil on a valley floor
The soil on the hillside can roll down because of rain, landslides, etc , and so it would continue to develop in the areas
The soil in the valley floor, however, should be staying in the same condition for most of the time
hope this helps
DNA stands for Deoxyribonucleic acid which means it is a nucleic acid. RNA stands for Ribonucleicacid. RNA produces proteins
DNA replicates and stores genetic information.
RNA converts the genetic information contained within DNA to a format used to build proteins.
I would have to say the answer is A based off the information above.
Please correct me if I'm wrong.