Across
- 3. a low-lying tract of land enclosed by dikes.
- 6. community of living things in their natural habitat
- 7. hills, mountains and plateaus
- 8. easily traveled by boats and ships
Down
- 1. navigable routes of travel and transport
- 2. bodies of water surrounded on three sides by land
- 4. deep and narrow bays
- 5. body of land surrounded on three sides by water