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Q.
$X$ controls the process of burning of fats, proteins and carbohydrates and liberate energy in the body $X$ is
Biomolecules
Solution:
Thyroxine is the hormone that helps in the regulation of the metabolism of the body i.e., burning of fats, proteins, and carbohydrates.
Adrenaline release in extreme conditions like - fear, etc.
Insulin helps the conversion of glucose to glycogen.
Cortisol is one of the steroid hormones which helps in a stress situation.