Answer: I think that it would be C because blooms are due to eutrophication, which means that there are high levels of phosphate in the water. Phosphate is a main ingredient in pesticides, which can run-off into rivers.
Answer: DNA → RNA → protein
The sequence stated above
represents the central dogma of molecular biology. During the transcription process,
DNA (Deoxyribonucleic Acid) codes for mRNA (Messenger Ribonucleic Acid); the
mRNA in turn, codes for polypeptides during the translation process.
I have attached an image answering your question.
Areas with the warmest is the surface