Which of the following statements correctly describes the oceans?

• A. Oceans are the smallest type of water body on Earth.
• B. Oceans cover approximately 70% of Earth's surface.
• C. Oceans are composed primarily of freshwater.
• D. Oceans contain no living organisms.

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by analyzing each statement provided in the problem to determine its accuracy based on biological and environmental knowledge.
2. Step 2: Evaluate the first statement, 'Oceans are the smallest type of water body on Earth.' Recall that oceans are the largest water bodies on Earth, covering vast areas, so this statement is incorrect.
3. Step 3: Examine the second statement, 'Oceans cover approximately 70% of Earth's surface.' This aligns with scientific data, as oceans indeed cover about 70% of the Earth's surface. This statement is correct.
4. Step 4: Assess the third statement, 'Oceans are composed primarily of freshwater.' Oceans are composed primarily of saltwater, not freshwater, so this statement is incorrect.
5. Step 5: Review the fourth statement, 'Oceans contain no living organisms.' Oceans are teeming with life, including diverse ecosystems such as coral reefs, plankton, fish, and marine mammals. This statement is incorrect.