Those with a specific phobia go to great lengths to avoid what they are afraid of

When we exert ourselves, our breathing and heart rate speed up, an example of the body's physiological balance called ______

Fill in the blank with correct word

Which of the following is a measure of an individual's perceptual speed?

a. pressing a button in response to a sound b. recalling one's 16th birthday c. reciting the Gettysburg address d. completing a crossword puzzle