**6. Concept of food insecurity**

Food insecurity will happen when there are problems at any one level of the food production-consumption pathway. The FINS level upstream has a big effect on those downstream. Food insecurity is when adequate, safe, and nutritious foods are unavailable or when there is uncertainty about how to get acceptable foods in a socially acceptable way [29]. In the United States, food insecurity occurs when the access and availability of food for the future are uncertain, not enough food for a healthy lifestyle, or there is the need to adopt unethical methods to obtain food [30]. Food insecurity can occur for several reasons, the most common of which is a lack of financial resources; however, it can also occur when food is readily available and easy to obtain, but it is unable to be consumed due to physical limitations, like the partial physical functioning of the elderly and disabled individuals [30]. Despite this, given the current emphasis on health fairness, priority should be given to individuals living in the most precarious conditions. They are being put under pressure by a variety of calamities, both natural and artificial, like droughts, wars, floods, and conflicts. There is an imperative need for improved methods of managing the precarious state of food supply. In a perplexing turn of events, the populations with the highest levels of food insecurity, like immigrants, the homeless, and displaced persons, are typically excluded from food security surveys, which leads to an underestimation of the extent of the issue.
