Question

what is one of the roles coral reefs play in marine ecosystems?
decrease biodiversity
deplete marine life
source of shelter and protection
increase pollution

Explanation:

Coral reefs are known as the "rainforests of the sea" due to their high biodiversity. They provide habitats (shelter) for numerous marine species. Options like "decrease biodiversity", "deplete marine life", and "increase pollution" go against the ecological role of coral reefs.

Answer:

C. source of shelter and protection