How can you say, surface water is a must for land animals?
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Solution
All living things from tiny cyanobacteria to giant blue whales need water to survive.
Animals need fresh water for their bodies to function, they gain water not only through the action of drinking but also from the food they eat.
Land animals need water to maintain their vital physiological functions which they easily find from the surface water.
Surface-water helps them to function in the regulation of temperature, nutrient uptake, and removal of waste from the body and also for body weight and health.