What contrast is created by the pair of old book and mechanical teacher in the story?

Physical memory of the past and machine system of the future

The governing literary device is symbolic contrast. The old printed book is a physical object from an earlier age; its pages, fixed text, and shared history represent the educational past. In contrast, Margie's mechanical teacher represents a future in which lessons are delivered by machines inside the home. Placing these two objects together makes the reader compare traditional, communal schooling with individualized technological instruction. Thus option A is correct. The objects are not two identical machines, and the alternatives about games or cooking have no connection with the chapter's central educational comparison. The contrast also encourages reflection on what technology may gain and what it may remove.

This is a Class 9 English question. Chapter: The Fun They Had. Topic: impact of technology.