an abundance of dissolved oxygen dead zones where there are no fish a reduction in atmospheric carbon dioxide food webs with rapidly growing populations
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Farm fertilizers are often carried by runoff into the Mississippi River and down to the Gulf of Mexico, resulting in algae blooms. Which of these results from the decomposition of the algae blooms?
Possibilities:
- an abundance of dissolved oxygen
- dead zones where there are no fish
- a reduction in atmospheric carbon dioxide
- food webs with rapidly growing populations

dead zones where there are no fish