Final answer:
After three days without sustenance, a person might think of desperate measures to acquire food, endure the psychological effects of hunger, and consider survival strategies.
Step-by-step explanation:
When a person goes without sustenance for an extended period, such as three days, they typically begin to experience intense hunger and may start thinking of desperate measures to acquire food. In historical and fictional narratives, characters have considered drastic actions like eating unconventional food sources, stealing, or in extreme cases, resorting to cannibalism. The human body can endure without food for about two weeks, assuming water is available, but the psychological and physical effects of hunger can be profound and prompt a range of survival strategies.