Adaptations are the special features that help a plant or animal live in a certain place or habitat. Adaptations help animals and plants survive. Behavioral, life cycle, and physical adaptations help an organism survive. A behavioral adaptation is something an organism does to help it survive. A physical adaptation is a part of an organism that helps it survive. A life cycle adaptation is something an animal undergoes to help it survive.
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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.