Question

Areas in the ocean with low oxygen concentration that causes suffocation and death of animal life.

• A. Dead Zone
• B. Whirlpool
• C. Seabed
• D. Blackwater

Answer 1

The correct option is A

Dead Zone

• Dead zones are areas of water bodies where aquatic life cannot survive because of low oxygen levels.
• Excess nitrogen and phosphorus cause an overgrowth of algae in a short period of time, also called algae blooms. The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants.
• It is generally caused by significant nutrient pollution and is primarily a problem for bays, lakes and coastal waters since they receive excess nutrients from upstream sources.