FOOD security in the WORLD.According to the author, the problem behind the existence of hunger, starvation and malnutrition around the world is lack of purchasing power by the poor in developing economy.Another reason is also an uneven SUPPLY of food from food surplus regions of the world to food-deficit regions.Therefore, the food security problem of the world can be solved by improving the price affordability of the poor and REGULATING the conditions of marketing, so that the food can be supplied from food surplus regions to food-deficit regions. Therefore, the correct option is ‘2 and 3 only’.