Question

Read the following passage carefully before choosing your answer:

*The bell above the door gave a dry, metallic rattle as Arthur stepped into the workshop, his fingers tracing the cold iron latch. It was the same latch he had reached for on tip-toe as a boy, long before the shop had fallen into silent disuse and the workbench had accumulated a thick shroud of gray dust. The scent of lubricating oil and dry paper drifted from the drawers, carrying with it the memory of that autumn afternoon thirty years ago—the afternoon he had stood by the high stool to watch his grandfather wind the gold pocket watch that would serve as their family’s final security. In his hand, Arthur held the selfsame pocket watch, its hands frozen at a quarter past four. He stepped forward into the chilly gloom, his boots creaking on the floorboards, a sound that seemed to echo not just in the empty room but back through the decades. He had returned to place the timepiece back where it belonged, but the physical space had altered; the glass cases were empty, their velvet linings faded by years of sun, and the stool where his grandfather had sat was now tipped on its side. Yet the sequence of his memories was more vivid than the ruins before him. He could still hear the rhythmic tick of the wall clocks, still see the intense concentration in his grandfather’s eyes. Arthur set the watch down on the workbench, feeling as though he were finally winding down a mechanism that had run for far too long.*

Which of the following best describes the narrative function of the shift from Arthur's present actions to his memory of the autumn afternoon?