Which color is described as increasing heart rate and blood pressure?

• A. Increases heart rate and blood pressure.
• B. Causes a calming effect.
• C. Relaxes the eyes.
• D. Signals safety.

Answer: (A)

Color activation: red tends to elevate physiological arousal, which includes increasing heart rate and blood pressure. Seeing red often signals urgency or danger, triggering the body's sympathetic response that heightens alertness, speeds the heartbeat, and raises blood pressure. Because of this activating effect, red best fits a color described as increasing heart rate and blood pressure. In contrast, calming colors such as blue or green tend to reduce arousal and relax the body, while signals of safety aren’t primarily about boosting physiological arousal. So the activating nature of red explains why it’s the best match for that description.