Tommy finding a human teacher strange indicates what?

Correct answer: Machine teachers are normal in his world

The governing concept is perspective shaped by time and social conditions. Tommy lives in a future where children normally receive instruction from mechanical teachers at home. Because that arrangement is familiar to him, the idea of an old-fashioned human teacher seems strange rather than ordinary. His reaction therefore reveals that machine-based education has become normal in his world, making option B correct. Option A is unsupported because Tommy clearly knows about education. Option C is false because the printed book contains words, and option D is absurd: the story does not suggest that human teachers are unable to speak. The contrast highlights changing educational practices.