Answer:
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A constant in an experiment is <u>B. </u><span><u>the quantity that must remain the same</u>. If it is constant, it doesn't change, so it cannot be variable. D makes no sense.
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Answer;
Potential energy
Explanation;
-An object can store energy as the result of its position.This stored energy of position is referred to as potential energy.
-The energy an object has because of its position, rather than its motion. An object held in a person's hand has potential energy, which turns to kinetic energy; the energy of motion, when the person lets it go, and it drops to the ground.
