Correct Answer: below freezing point

Solution : The correct answer is below freezing point.

Temperature reduction below the freezing point without causing a liquid or gas to solidify is known as supercooling. Without solidifying or crystallizing, an object cools below its freezing point when it undergoes supercooling. When a liquid's temperature falls below the freezing point without condensing into a solid, supercooling takes place. Frequently known as undercooling.