What is this?
dune
landform
desert
What is this?
boreal forest
plateau
glacier
Tropical forests ________ an important role in regulating the Earth's climate.
set
make
play
What is this?
pollen
seed
soil
Three-quarters of the Earth's is _______ with water.
consumed
increased
covered
There has been a ________ increase in the efforts to preserve wildlife habitats.
similar
identical
significant
What is this?
leaves
plants
insects
Tropical forests are mainly found near the _______.
ocean
equator
South Pole
The photos were taken in identical places. "identical" means _______
very different
very surprising
very similar
