Final answer:
Social presence is the channel choice factor that creates psychological closeness to others, awareness of their humanness, and appreciation of the interpersonal relationship.
Step-by-step explanation:
The channel choice factor that creates psychological closeness to others, awareness of their humanness, and appreciation of the interpersonal relationship is Social presence. Social presence refers to the extent to which people feel connected to each other while communicating through a particular channel. It involves the perception of others as real, present, and available for communication, thus creating a sense of psychological closeness and interpersonal connection.