Which of the following is a human activity that poses a threat to coral reefs?

• A. Sustainable fishing
• B. Destructive harvesting techniques
• C. Conservation efforts
• D. Restoration projects

Answer: (B)

Destructive harvesting techniques are indeed a human activity that poses a significant threat to coral reefs. This type of activity includes methods that not only extract coral but can also damage the surrounding environment and the complex ecosystems that coral reefs support. Techniques such as blast fishing or the use of cyanide for capturing fish can lead to severe physical destruction of the coral structures and disrupt the balance of marine life. In contrast, options related to sustainable practices, conservation efforts, and restoration projects are aimed at protecting and rehabilitating coral reefs, thereby safeguarding these vital ecosystems.