What percentage of the Earth's surface is covered by water?

Water is essential for all known forms of life. It covers about 71% of the Earth's surface, mostly in oceans and other large water bodies. While indispensable for survival, only a small fraction of the Earth's water is freshwater available for human use, making conservation crucial.

What percentage of the Earth's surface is covered by water?

1. A.29%
2. B.50%
3. C.71%
4. D.90%