Answer and Explanation:
A. Geographers can map data that reveals the number of supermarkets and grocery stores in the region, the difficulty of access to supermarkets and grocery stores and the availability of vegetable gardens and food production sites in the region.
B. These regions promote a greater demand for fresh food, but the increasing urbanization and industrialization of these areas reduces the agricultural areas and, therefore, decreases the availability of these foods. In addition, the busy life of the inhabitants makes them look for faster and already prepared foods, which are industrialized products.
C. An impact that a food desert can provide is the mass malnutrition of the population, as well as a series of other diseases that can lead to a progressive decrease in the population of the region.