The country not a part of Central America

1. Mexico
2. Costa Rica
3. Panama
4. Belize

The major drainage system of North America with river Ohio as its major tributary

1. Mississippi
2. Colorado
3. St. Lawrence
4. Mackenzie

It covers the Eastern and northeastern part of North America

1. Central lowlands
2. Canadian Shield
3. Western Cordilleras
4. Eastern Highlands

The Central Lowlands lie between the western Cordilleras and the ……………

1. Appalachian
2. Canadian Shield
3. Great Lakes
4. Islands