Question

5. Which of the following is a threat to coral reefs?
a. oil spills
c. sewage
b. pesticides
d. All of the above​

Answer 1

Answer:

It should be option a. oil spills. ʕಠ_ಠʔ

Answer 2

The threat to coral reefs is all of the above (option d).

• Oil spills are the discharge of petroleum in the water bodies.
• The oil spills impose a major threat to not just the coral reefs but also the whole environment.
• The sewage also threatens the coral reefs because they provide too many nutrients that give rise to algae and seaweed.
• The reproduction and growth of the coral are affected by pesticides.
• This is why all of the above is a threat to the coral reefs.