Excess growth of algae: a. decreases the amount of bacteria in the water
b. causes the formation of slime
c. helps speed the rate of photosynthesis
d. increases the amount of oxygen in the water ​

Your answer is 1.5 hope i  

Kiloleter, mega leterhope this !

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.