Fish need water to breathe.

Meaning: This means that fish use water to get the oxygen they need to survive. They take in water through their gills, which extract the oxygen from the water.

Choice of Words: Fish are cold-blooded aquatic vertebrates with gills. Need is a verb meaning to require something. Water is a liquid that makes up the Earth's oceans, lakes, and rivers. Breathe is a verb meaning to take in air or oxygen.

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Related Expressions