What is this?
Desert.
Which is the biggest continent?
Asia.
What is this?
sea or ocean
What is this?
lake
What is drier? The forest or the desert?
The desert.
Which is higher? The mountain or the hill?
The mountain.
What is this?
waterfall
What is the largest country in the world?
Russia.
What is this?
mountain
What is this?
river
In which of them water is saltier? In the lake or in the sea?
In the sea.
What is this?
Island.
What is this?
beach