Answer:
B
Explanation:
DNA is made first, which the makes it's counterpart RNA, which makes protein because that's it's job.
The answer is C
if you kill all the sea otters (which is wrong) then there is nothing to kill the sea urchins which then the sea urchin population will increase. Because sea urchins feed on kelp and there are so many of sea urchins, it requires more kelp to be eaten. Last, the kelp population is low because all the sea urchins ate most of the kelp
Without the options to the question, it is hard to say exactly what your teacher is looking for. Very likely it is something commonly found in all nucleic acids like the presence of phosphorus or nitrogen.