The answer is probably a reflex.
A respond is what your body does in a reaction to a stimulis.
A reflex is an automatic and involuntary response of the body to a stimulus, processed through a reflex arc. This quick reaction helps protect your body and allows for immediate action, which is critical in response to potential danger. Everyday examples include pulling your hand back from a hot stove and the knee-jerk reaction during a medical check-up.
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