1) Stability of food security incorporates the ability to withstand shocks and resilience, with chronic food insecurity being constant and transitory insecurity being unpredictable or seasonal. Vulnerable groups include the rural landless, subsistence farmers, cash crop farmers, pastoralists, remote dwellers, the urban informal sector and unemployed, and female-headed households.
2) Food consumption patterns change with income level, from staples to livestock and dairy to fruits and vegetables. Demand is forecast based on population growth, income growth, and price changes using income and price elasticities.
3) Emerging challenges to food security include slower production growth, increasing demand for biofuels,