A hot air balloon pilot wants the balloon to quickly rise several feet higher so it will be above some trees in the distance. Which best explains how the pilot can make the balloon rise?

A hot air balloon rises when the air inside it is warmer and less dense than the surrounding air. The less-dense air provides an upward buoyant force, lifting the balloon. Therefore, the pilot should increase the temperature inside the balloon so it is warmer than the surrounding air.

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