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Multiple Choice

Less than 1 percent of water is available for humans to use. Which option shows that percentage?

A very small portion of Earth's water is usable by humans; most water is saltwater or locked away in places that aren’t easily accessible. This makes the figure “1%” the one that best represents the idea of a tiny share being usable. The other options—5%, 10%, and 20%—would imply a much larger amount is available, which doesn’t fit the idea that only a minute fraction is accessible.

A very small portion of Earth's water is usable by humans; most water is saltwater or locked away in places that aren’t easily accessible. This makes the figure “1%” the one that best represents the idea of a tiny share being usable. The other options—5%, 10%, and 20%—would imply a much larger amount is available, which doesn’t fit the idea that only a minute fraction is accessible.