A food chain shows how living things get food. It also shows how nutrients and energy are passed from level to another level on the food chain. Food chains begin with plant life, and end with animal life. First, the plants must get the energy from the Sun. It is then passed on to other levels of the food chain through different animals until the end of the chain. A food web shows how plants and animals are connected in many ways to help them all 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.