First lets start with physical appearance which would include of course age and the sex of a person. Also the the facial features and skin are important in describing an individual as well as level of consciousness.
Significant information for body structure would include body build as well as contour and stature. Symmetry and position and as well as nutrition likewise provide significant information.
Mobility usually refers to range of motions person exhibits and their gait, which provides information how person walks, runs and does other such activities.
Behavior has many significant information such as facial expressions and mood and affect. These can be a seen also as a part of nonverbal communication and thus provide a wealth of information. Speech also contains many information as well as how someone dresses. Personal hygiene is also a factor here.
Kayla is experiencing selective exposure, the selective exposure theory states that individuals have a tendency to favor informations that corroborate with their views while avoiding informations that would oppose them. When she pays special attention to information that supports buying the phone she likes and ignores information that don't, she's experiencing an example of the selective exposure theory.
B, the president is quite social lol