1.The four major kinds of natural vegetation in the U. S. and Canada are grassland, desert scrub, tundra, and what Permafrost
Swamp
Forest
Lakes

2.The separates the east flowing rivers from the west flowing rivers.
Death Valley
Ohio River
Mississippi River
Susquehanna River

3. 2nd largest mountain ranges found in the United States, located on the eastern part of the United States. *
4 points
Rocky Mountains
Andes Mountains
Himalaya Mountains
Appalachian Mountains