A human teacher is different from a mechanical teacher because what can he do?

Respond after understanding a student's feelings

The governing concept is responsive, learner-centred teaching. A human teacher can listen to a student's words, observe expressions and behaviour, understand feelings, and then adjust the explanation or response. This personal understanding can provide comfort, encouragement, and motivation in ways that a programmed machine cannot fully reproduce. Therefore, option A is correct. Option B describes mechanical marking rather than human understanding. Option C is limited to the function of a screen and therefore better describes a machine. Option D is the opposite of a teacher's role, since listening to questions is essential for teaching. The story uses Margie's isolated mechanical lessons to make this difference clear: information may be delivered automatically, but sensitive response requires a person.

This is a Class 9 English question. Chapter: The Fun They Had. Topic: the importance of human teachers.