Solution:
East Asia, Southern Asia, North Western Europe are regarded as areas of high density of population.

Solution:
The Rhine is one of the longest and most important river in Europe. It runs for over 1,232 km (766 mi) from its source in the in the Swiss Alps (in Switzerland), issuing from the Rheinwaldhorn Glacier 3,353 m above sea level.

Solution:
It actually takes the Earth slightly over 23 hours and 56 minutes to rotate once around this axis.

Solution:
Shisham is a hardwood tree. Sheesham wood also known as Indian Rosewood or Dalbergia sisso, is a deciduous tree. After teak, it's most significant cultivated timber tree in Asian country.

Solution:
Po river flows through Italy. Po River, Latin Padus, longest river in Italy, rising in the Monte Viso group of the Cottian Alps on Italy’s western frontier and emptying into the Adriatic Sea in the east after a course of 405 miles (652 km).

Solution:
The earlier name of Surinam was Dutch Guyana. Formerly known as Dutch Guiana, Suriname was a plantation colony of the Netherlands that gained its independence on 25 November, 1975. When the territory was taken over by the Dutch, it became part of a group of colonies known as Dutch Guiana.

Solution:
There are two types of crusts - the continental and the oceanic. The continental crust is thicker below the mountains than below the plains. Both continental and oceanic crusts are less dense than the mantle, so both float in the mantle. Continental crust floats higher in the mantle than oceanic crust because continental crust is both less dense and thicker than oceanic crust.