An adaptation is a way an animal’s body helps it survive or live in its surroundings. It occurs when an animal’s body changes over time to help it live in its habitat. An example is a lion’s loose belly skin, which allows the animal to be kicked by prey with little chance of injury.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.