Which statement is NOT listed as a cause of coral reef damage?

Which statement is NOT listed as a cause of coral reef damage?

• A. Increasing ocean temperatures
• B. Sediment runoff
• C. Destructive fishing practices
• D. Increased rainfall frequency with no sediment transport

Answer: (D)

Coral reefs are harmed by stressors that directly affect their water quality and physical structure. Warmer ocean temperatures push corals toward bleaching, weakening their symbiotic algae and reducing growth. Sediment runoff reduces light penetration and physically smothers coral tissue, leading to slower growth or mortality and encouraging algae to take over. Destructive fishing practices cause direct damage to the reef structure and disrupt ecological balance, making it harder for corals to recover. The statement about increased rainfall frequency with no sediment transport doesn’t fit these damage pathways—when rainfall rises, it typically drives more runoff carrying sediment into coastal waters, which is a major way reefs are damaged. Without sediment transport, that mechanism isn’t operating, so it isn’t listed as a cause of coral reef damage.

Coral reefs are harmed by stressors that directly affect their water quality and physical structure. Warmer ocean temperatures push corals toward bleaching, weakening their symbiotic algae and reducing growth. Sediment runoff reduces light penetration and physically smothers coral tissue, leading to slower growth or mortality and encouraging algae to take over. Destructive fishing practices cause direct damage to the reef structure and disrupt ecological balance, making it harder for corals to recover. The statement about increased rainfall frequency with no sediment transport doesn’t fit these damage pathways—when rainfall rises, it typically drives more runoff carrying sediment into coastal waters, which is a major way reefs are damaged. Without sediment transport, that mechanism isn’t operating, so it isn’t listed as a cause of coral reef damage.