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

CAPF AC 2021 PYQ with Answer — Which of the following factors are needed for the growth of corals? 1…

2021 · Q104

Which of the following factors are needed for the growth of corals?

1Freshwater
2Clear shallow salt water
3Plenty of sunlight for photo synthesis
4Warm water between 23 °C and 25 °C

Select the correct answer using the code given below.

indian-world-geographyoceanography

A1, 3 and 4 only
B2, 3 and 4 only
C1 and 2 only
D1, 2, 3 and 4

Explanation

Corals require clear, shallow salt water (statement 2) so sunlight reaches the symbiotic zooxanthellae, plenty of sunlight for photosynthesis (statement 3), and warm water between about 23 and 25 °C (statement 4). Freshwater (statement 1) is harmful to corals. Hence statements 2, 3 and 4 are the required factors.