When is the need for a human teacher most clearly visible?

When a child faces boredom, mistakes, and loneliness while learning

The governing concept is that education involves more than delivering information: it also requires encouragement, explanation, observation, and human connection. When a child becomes bored, makes repeated mistakes, or feels alone, a human teacher can notice the difficulty, change the method, give an example, answer follow-up questions, and provide emotional support. Therefore option D is correct because it identifies the situation in which personal guidance is most necessary. Option A merely describes speed, not effective learning; option B concerns an unread book and does not establish the need for a teacher; option C is an isolated action by Tommy and is unrelated to the central educational issue.

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