How does a decrease in the exchange value of the American dollar affect the ability of the United States to trade with other nations?

If the value of the dollar falls, the United States can afford fewer goods and services from other countries.
If the U. S. dollar’s value falls, it is less expensive for Americans to import products from other countries.
As the value of the U. S. dollar falls, prices for goods and services in other countries will go down.
When the dollar’s value falls, other countries buy fewer goods and services from the United States.