Which of the following is not an important condition for growth of coral?
A
Wave-free salt water
B
Clean salt water
C
Warm seas
D
Plenty of sunlight
Correct Answer: Wave-free salt water
Wave-free salt water is not an important condition for growth of coral. Corals need saltwater to survive and require a certain balance in the ratio of salt to water. This is why corals don't live in areas where rivers drain fresh water into the ocean (“estuaries”).