Solution:
Ria coasts are known as coastlines of submergence. A ria coast is a coastline having several parallel rias separated by prominent ridges, extending a distance inland. The sea level change that caused the submergence of a river valley may be either eustatic (where global sea levels rise), or isostatic(where the local land sinks).

Solution:
The "cradles of civilization" have been Plains. In Mesopotamia, the convergence of the Tigris and Euphrates rivers produced rich fertile soil and a supply of water for irrigation.It is because of this that the fertile crescent region, and Mesopotamia in particular, are often referred to as the "cradle of civilization".

Solution:
Takla Makan desert is situated in Sinkiang. It is a great desert of Central Asia and one of the largest sandy deserts in the world. The Takla Makan occupies the central part of the Tarim Basin in the Uygur Autonomous Region of Xinjiang, western China.

Solution:
Iceland has over 200 volcanoes, many of them active. There are approximately 130 volcanoes in Iceland, active and inactive. About 30 active volcanic systems can be found under the island, in all parts of the country other than the Westfjords.

Solution:
The broken hill famous for zinc and lead are located in Australia. The Broken Hill Ore Deposit is located underneath Broken Hill in western New South Wales, Australia, and is the namesake for the town. It is arguably the world's richest and largest zinc-lead ore deposit.

Solution:
The thousands of lakes in Finland are the reason why the country's nickname is "the land of a thousand lakes", but at last count there were 187,888 of them - more lakes in relation to a country's size than any other.

Solution:
An isthmus is a land bridge, a narrow strip of land that stretches across a body of water to connect two larger land masses. The Greek isthmos means "neck," so you can see how isthmus came to mean the connecting strip between land masses.