Interpersonal relationships are central to a teacher’s work with students.
Why B fits: A teacher needs to listen, communicate respectfully, understand learners, and manage interactions fairly.
Why the others are incomplete: Subject knowledge and verbal ability matter, while strict handling alone may damage trust. None replaces a constructive relationship with students.
Practical point: Positive relationships do not require excessive familiarity. They involve clear boundaries, consistent expectations, empathy, and support for learning.