Question

Why is it necessary for coral reefs to live in shallow, tropical waters with lots of sunlight?A-The coral polyps need sunlight for photosynthesisB-The algae need sunlight for photosynthesisC-The coral bleach easier in the shallow watersD-They need the sunlight to tan and keep their color

Answer 1

The correct answer would be the letter

B-The algae need sunlight for photosynthesis

Coral reefs have a symbiotic relationship with zooxanthellae. These algae need sunlight for the process of photosynthesis. Without zooxanthellae, coral reefs will die due to coral bleaching.