Passage

Coral reefs support a wide range of marine life and protect coastlines from waves. Rising ocean temperatures, however, can cause coral bleaching and threaten these ecosystems.

Question

Which is the best title for the passage?

Answer

Coral Reefs: Benefits and Threats.

Solution

1. The passage first explains the value of coral reefs.
2. It then introduces the threat of warming and bleaching.
3. The title includes both major parts without adding unsupported information.