People produce food in many ways．Agriculture，or farming，developed j thousands of years ago. ___11___about 100 years ago, most farmers in the United States Produced only enough food for their own___12___Today,modern equipment and farming methods have greatly ___13___the American farmer’s productivity.

In various parts of the world,people___14___many animals that supply meat and milk. Cattle, horses, goats, sheep, and pigs are important food animals. In the United States, the cow is the major source of milk products. Chickens___15___ people with both meat and eggs.

Fishing is an important source of food , ___16___in areas near the sea. Some countries, like Japan, consume much more fish than meat.

The wealthy areas of the world consume the most food , ___17___include the United States, Canada, and Europe. Many countries are able to import food if it cannot be produced at home. ___18___Great Britain imports about 75percent of its meat，and grows less than half the food its people require.

___19___people of the poor countries of the world usually eat only what they are able to produce themselves. In some parts of Asia, people live ___20___rice alone.