Which of the following factors are needed for the growth of corals?
1. Freshwater
2. Clear shallow salt water
3. Plenty of sunlight for photosynthesis
4. Warm water between 23°C and 25°C
Select the correct answer using the code given below.
1
1, 3 and 4 only
2
2, 3 and 4 only
3
1 and 2 only
4
1, 2, 3 and 4