Final answer:
The characteristic that does not define friendship among loyalty, trust, exclusivity, and respect is exclusivity. Friendships include trust, loyalty, and respect and do not require exclusivity or prevent having multiple friends.
Step-by-step explanation:
The characteristics of friendships typically include qualities such as loyalty, trust, and respect. These attributes foster meaningful and lasting relationships. Exclusivity, however, is not generally considered a necessary component of friendship. In most scenarios, friendship does not require a person to be exclusively someone else's friend and does not restrict individuals from having other friends. Therefore, the characteristic that does not define friendship is Option 3: Exclusivity.
The value of friendship is intrinsically linked to how it enriches our lives and contributes to our moral and virtuous development, as articulated by Aristotle. Unlike utility-based or pleasure-based incidental friendships, perfect friendships are those in which individuals wish well for each other for their own sake, ultimately promoting the flourishing of virtue in one's character. Friendships built on the solid foundations of trust, loyalty, and respect naturally encourage the growth of one's virtues and personal happiness.