Energy is the ability to do work. There are many different forms of energy. Kinetic energy is the energy possessed by an object due to its motion while potential energy is the energy an object has due to its position. Chemical energy is produced when a new substance is formed through a chemical reaction and produces heat, light or motion.
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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.