D. Homeostasis- naturally selected function
Rhodophytes are the ones who store food as floridian starch and i think they belong to the red algae group
Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a natural or an industrial means to a form of nitrogen such as ammonia. In nature, most nitrogen is harvested from the atmosphere by microorganisms to form ammonia, nitrites, and nitrates that can be used by plants.