Answer:
Nick is more likely to exhibit a heightened cortisol reaction and demonstrate greater levels of physical aggression.
Explanation:
Cortisol, commonly known as the "stress hormone," has been shown in recent studies to be present in higher concentrations during the summer. Therefore, individuals like Nick, who live in warmer climates, are more susceptible to elevated cortisol levels during stressful situations. Increased cortisol levels are correlated with higher physical aggression.