______________ of earth surface is covered with water?
Correct answer: C. 75%
- A. 10%
- B. 30%
- C. 75%
- D. 90%
Explanation
Approximately 71% of Earth's surface is covered by water, and this is conventionally rounded to about 75% in many biology texts. The 90% option greatly overestimates the coverage and may be chosen by confusing Earth's water-rich appearance with its actual surface proportion.
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