Final answer:
In the U.S., women expressing closeness through hugging and handholding with others of the same sex is an example of Platonic affection, which is nonsexual and homosocial, distinct from homosexual attraction.
Step-by-step explanation:
The behavior in question, where females in the U.S. can express closeness and regard for people of the same sex through hugging, handholding, and physical closeness, is an example of Platonic affection. This type of behavior is associated with nonsexual feelings of friendship and closeness, often termed homosocial behavior. It is important to note the difference between homosocial and homosexual relations, as the latter refers to sexual attraction to people of the same sex, while the former refers to nonsexual social bonds. The heteronormative expectations in U.S. culture often discourage men from expressing similar forms of physical closeness.