Final answer:
The scenario illustrates the psychological process of habituation, where humans have become desensitized or accustomed to the abundant availability of salt, sugar, and fat in our diets.
Step-by-step explanation:
The psychological process that the scenario described illustrates is habituation. Habituation is the process by which we become desensitized or accustomed to a stimulus over time. In historic times, when food was scarce, humans developed a taste for food that gave them lots of energy. However, in current times, when we are surrounded by food, we have become habituated to the abundant availability of salt, sugar, and fat in our diets, which has led to negative impacts on our health.