Final answer:
Food is not available if it is more costly than what people can afford, as high cost is a significant barrier to food access, especially in low-income and minority communities impacted by food deserts.
Step-by-step explanation:
Food is not available if it is D. More costly than people can afford. Even if food is grown in the region and available at local markets, certain social conditions might still render it inaccessible. High cost is a key factor that prevents many people from obtaining nutritious foods; this is especially true for those living in low-income or minority communities, often affected by food deserts. It's important to note that the presence of nutrients, such as being high in vitamins and nutrients, does not directly affect the availability of food to individuals.
The globalization of food and long distances of transport can lead to higher prices. Even though local and organic foods could ideally be less expensive due to lower transportation costs, this is not always the reality, as shown in Figure 3.1 from a Farmer's Market. Moreover, a family's dietary options are significantly influenced by income, which reflects their ability to purchase protective foods that are rich in essential nutrients, as implied by the background information provided.