Question

The whistle of the locomotive shrieked, a sharp blade cutting through the damp fog of the station. Teresa stepped toward the open carriage door, her fingers tightening around the leather strap of her valise. But as her boot touched the iron step, the smell of coal smoke and wet wool vanished, replaced by the memory of her father’s study on the eve of her departure. She was ten again, sitting on the Persian rug while the grandfather clock ticked with agonizing slowness, counting down the final hours before he sailed. He had handed her a small, brass-rimmed magnifying glass, its lens scratched in a perfect crescent. "Look closely at the details, Teresa," he had whispered, his voice dry as old parchment. "The world moves too quickly for those who do not look." The memory evaporated as a porter’s heavy hand gripped her elbow, steering her into the crowded aisle of the train. The engine grunted, wheels grinding against the tracks as the journey began in earnest, but Teresa remained suspended in the quiet room of her childhood, the scratch on the magnifying glass suddenly larger than the path ahead.

In the passage, the narrator’s transition from the immediate action at the train station to the memory of the father’s study primarily functions to