Final answer:
The communication practice exemplified by a sorority member wearing a sorority pin and shirt with the sorority's logo while in public is nonverbal communication.
Step-by-step explanation:
The communication practice exemplified by a sorority member wearing a sorority pin and shirt with the sorority's logo while in public to be noticed as a member is nonverbal communication. Nonverbal communication refers to the use of body language, gestures, and other nonverbal cues to convey messages. In this case, wearing the sorority pin and shirt acts as a nonverbal symbol of affiliation and membership.