Jack, compared to most other people, appears to need a high level of arousal. He enjoys doing potentially life-threatening hobbies such as sky diving, swimming with sharks, and bungee jumping from bridges. Jack is likely to be a .

sensation seeker

Explanation:

Sensation-seeking, also known by the name of excitement-seeking, refers to a desire to explore fresh and distinct stimuli, emotions, and encounters. The characteristic identifies individuals who seek out new, challenging, and intense stimuli, who enjoy experience for their own sake, and who are ready to take risks in seeking these experiences. Researchers conclude that this element incorporates four components. First of all, an intrinsic desire for excitement and risk. Second, a curiosity of diverse and novel sensations. Third, a natural desire to be uninhibited and unrestrained. Fourth, the vulnerability to boredom. The degree to which people have these four elements dictates whether they treat or resist new sensations.

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