4
Tundra
2
Hot and Wet! Tropical Rainforest
2
Treeless Plains! Steppe
2
Frozen Ground! Tundra
4
Taiga
4
Steppe
2
Warm Grasslands! Savanna
2
Evergreen Forests! Taiga
4
Montane Forest
4
Desert
4
Ecosystems Level 4
2
Four Seasons! Deciduous Forest
2
Water Everywhere! Aquatic
4
Aquatic
2
Hot and Dry! Desert
4
Tropical Rainforest
2
Snow and Ice! Polar
4
Deciduous Forest
4
Savanna