Brake is not included in your perception time.
To add, the total stopping distance of a vehicle is made up of 4 components. The human perception time; is how long the driver takes to see the hazard, and the brain realize it is a hazard requiring an immediate reaction.
Answer:
Brake
Explanation: The perception time of humans does not include brake. The perception time includes the prediction of the hazard, identifying the hazard timely and deciding that that he need to take brake. It can depend on the type of hazard and visibility. For an alert driver the perception time is approximately 3/4 seconds.
