How is the importance of human teachers connected with the fact that children learn differently?

A human teacher can change examples and pace according to learning differences

The governing concept is individual difference and responsive teaching. Children may vary in prior knowledge, pace, confidence, interests, and ways of understanding. A human teacher can observe these differences, repeat or simplify an explanation, provide another example, ask a probing question, or give extra time to a learner who needs it. Option A is correct because it describes this adaptation of examples and pace. A fixed mechanical system may follow programmed rules, but it cannot easily interpret the whole child or respond with practical judgment. Options B, C, and D describe uniformity, restriction, or neglect, which contradict the reason human guidance matters. Effective teaching combines a common goal with flexible support.

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