In the United States, we have lots of . Almost half of the world’s corn is grown here.
But we don’t need that much corn. So we with other countries.
When countries trade, they buy and sell and services.
For example, Japan does not have enough farmland to grow . We trade with Japan by selling them corn.
Japan sells and cars to us.
Many kinds of are used to carry goods.
Countries close to each other use trucks or .
Countries far apart use or ships.
The route, or way goods travel from one place to another, is called .
Mexico is very close to the United States. The goods we trade are sent in trains and .
The United States and Italy are far apart. Airplanes fly across the to carry the goods we trade back and forth.