Respuesta :
The correct adrenaline definition is that it is the way of responding to threats, i.e., option D.
What is adrenaline?
Adrenaline is a stress hormone that is released from the adrenal gland present on the top of both the kidneys.
It is body's way of responding to threats.
Thus, the correct option is D.
For more details regarding adrenaline, visit:
https://brainly.com/question/3462016
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