There are four main components of food security. These are availability, accessibility, utilization, and stability. Availability refers to whether food is physically available. In other words, it is related to the question of whether enough food is produced to meet the needs. The second dimension of food security is accessibility, which is the key issue when discussing food security. Utilization refers to food quality and nutritional content. This relates to health, HIV/AIDS, access to water and clean energy sources. FAO considers the principle of stability as the fourth dimension of food security. This principle is mostly related to the consequences of sudden shocks. The correct option is D.