Why does the production and consumption of food differ throughout the world?

the production and consumption of food differ because in households people buy and consumer food differently ,some may eat too much while others eat less ,this applies with production throughout the world approximately 255,000 food is being produced and has to be divided and exported to different places to make sure that people have what they need and it enough .what would happen is the production is less than consumption ,people would not be getting enough food to go about life