1. In which direction has the mainland U.S. expanded since the American Revolution? a. northward b. southward c. eastward d. westward 2. Which of the following will humans not normally avoid? a. cold weather b. warm weather c. deserts d. …
1. In which direction has the mainland U.S. expanded since the American Revolution? a. northward b. southward c. eastward d. westward 2. Which of the following will humans not normally avoid? a. cold weather b. warm weather c. deserts d. …