Answer:This is an example of a REFLEX
Step-by-step explanation:
A reflex action is an involuntary or instantaneous response to a given stimulus at that particular moment which protect our body from a situation that can injure us. For instance when we mistakenly touch a hot pot or iron and our nerves tells us to retreat immediately. It is our survival instinct.
This we do subconsciously since our nerves signal an immediate response to protect our bodies as soon as possible.
Jayden's body immediately realises that he can drown if he doesn't swim hence the reflex is to swim quick.