Final answer:
Counseling is the least formal style among counseling, coaching, and mentoring.
Step-by-step explanation:
In terms of formality, counseling is generally considered to be the least formal style among counseling, coaching, and mentoring. Counseling involves a one-on-one conversation between a professional counselor and a client, where the counselor provides guidance, support, and advice to help the client address personal or emotional issues.
Coaching is usually more structured and goal-oriented, focusing on a specific skill or performance improvement. Coaches provide feedback, instruction, and motivation to help individuals achieve their goals in areas such as sports, leadership, or personal development.
On the other hand, mentoring is a form of informal training and guidance, where an experienced individual (mentor) guides and supports a less-experienced individual (mentee) in their personal or professional development. Mentoring relationships can be formal or informal and usually involve a longer-term commitment.