The answer is "Groundwater"
I think it A because Cyanobacteria absorb co2 from the atmosphere and then release oxygen To the atmosphere
Answer:
<em>cellulose, starch and glycogen</em>
Explanation:
the three types of polysaccharides are cellulose, starch and glycogen
Overpopulation can lead to overuse of resources, extreme pollution, war, plague, starvation, and many more serious world problems