It refers to a large flat area of land that is high above sea level. It is a (a)   .

It refers to a large hole in the side of a hill.

It is a (a)   .

It refers a large valley with very steep sides and usually a river flowing along the bottom. It is a (a)   .

It refers to a high area of rock with a very steep side, often on a coast. It is a (a)   .

It refers to a small, narrow river. It is a (a)   .

It refers to an area of low land between hills and mountains, often with a river running through it. It is a (a)   .

It refers to a mountain with a large hole at the top which lava, gas, steam and ash from inside the Earth sometimes burst. It is a (a)   .

It refers to tropical trees found near water with twisted roots grow partly above the ground. They are (a)   .

It refers to a tropical forest in which trees and plants grow very closely together. It is a (a)   .