Final answer:
Interpersonal theory focuses primarily on a client's relationships and examines communication, social interaction, and the influence of others on an individual's thoughts, feelings, and behaviors.
Step-by-step explanation:
Interpersonal theory focuses primarily on a client's relationships. It aims to understand how individuals interact with others, including their family, friends, and society as a whole. This theory examines communication, social interaction, and the influence of others on an individual's thoughts, feelings, and behaviors.