Okay kiddo, so the American Cordillera is a really big and long series of mountains that go all the way from Alaska to the tip of South America. You know how trees have roots that go deep down into the ground? Well these mountains are kind of like the roots of the continent, holding everything together and shaping the land.
The American Cordillera is made up of different mountain ranges, like the Rockies in the United States and the Andes in South America. These mountains are a really important part of the world because they have lots of different kinds of plants and animals that live there. They also help to control the weather and climate in the area.
Some people think that the American Cordillera was formed a really long time ago when the continents were all smooshed together. As they started to drift apart, the mountains were formed by all the pressure and movement. Pretty cool, huh?
So that's basically what the American Cordillera is, a giant chain of mountains that helps hold together a big piece of the world.