Final answer:
Vladek Spiegelman engages in walking exercise while telling his story to Artie.
Step-by-step explanation:
Vladek Spiegelman engages in walking exercise while telling his story to Artie. The exercise is a way for Vladek to stay active and fit, as well as to stimulate his mind and improve his memory. Artie accompanies Vladek on these walks, providing an opportunity for both physical and emotional connection between father and son.