What characteristics should a security officer observe in a suspect?

The correct choice involves observing characteristics that include both aspects a person can change and those that are inherent and unchangeable. Security officers must be trained to note a variety of observable traits in a suspect to effectively assess potential threats or behaviors. These observations include physical attributes such as height, build, hair color, and facial features, which cannot be changed, as well as variables like clothing style or demeanor, which can change but can provide critical insights into the individual's current state of mind or intentions.

Relying solely on physical appearance, as suggested in another option, would severely limit the officer's situational awareness. In contrast, focusing only on clothing or on prior criminal history does not encompass the full range of observable behaviors and traits that can aid in assessing a suspect's intentions or state of mind. A comprehensive observation approach enhances the officer's ability to make informed decisions and take appropriate actions in various situations.