If algae are oxygen-producing aquatic life, why does ...

[fox]

If algae are oxygen-producing aquatic life, why does overproduction lead to a decrease in oxygen content of the water?
 
  A) They consume more oxygen than they produce.
  B) They block the absorption of oxygen at the surface of the water.
  C) They block the light needed by photosynthetic aquatic life.
  D) none of the above
  E) both A and B

Question 2

Two isotopes of the same element differ only in the number of neutrons found in the nucleus.
 
  Indicate whether the statement is true or false

[apple]

Answer to Question 1

E

Answer to Question 2

TRUE

[fox]

TYSM

[ghepp]

Thanks for the timely response, appreciate it