Which hormone, associated with dominant behavior and aggression, is produced in the testes in males?

Testosterone is a hormone that plays a significant role in the development of male physical characteristics and is closely linked to behaviors associated with dominance and aggression. It is produced in the testes in males and influences various physiological and psychological traits. Elevated levels of testosterone have been correlated with increased aggressive behavior, competitiveness, and assertiveness, all of which are often categorized under dominant behaviors.

In contrast, estrogen and progesterone, while they are important hormones in both males and females, primarily play roles in sexual reproduction and regulation of the menstrual cycle in females. Cortisol, known as the stress hormone, is associated with the body's response to stress rather than behaviors linked to dominance and aggression. Therefore, testosterone is identified as the correct answer due to its distinct association with male aggression and dominance-related behaviors.