Which physiological changes are correlated with fear?

The correct choice highlights the physiological responses commonly associated with fear. When a person experiences fear, the body activates the 'fight-or-flight' response, leading to several physiological changes. One of the most notable responses is an increase in heart rate, as the body prepares to respond to a perceived threat. This increase in heart rate is part of the autonomic nervous system's response, enabling faster blood circulation to essential organs and muscles, which is critical for immediate action.

Additionally, fear typically results in decreased skin temperature. This occurs because blood flow is redirected away from the skin towards vital organs and muscles, helping the body to conserve heat and focus its energy on necessary functions to react to danger. This combination of increased heart rate and decreased skin temperature is a classic indicator of the body's heightened state of arousal in response to fear.

In contrast to the other options, which suggest physiological changes that do not accurately represent the body's response to fear, the chosen answer effectively captures the essence of the physiological changes and their correlation with a fearful state.