Correct Answer :   unsuitable climatic conditions

The population density is low in polar regions because the climate is too cold and harsh for people to survive there. The polar regions such as the Arctic and Antarctica are the coldest places on the earth with little or no vegetation to support the resident population. Most of the polar regions are cold deserts.

Correct Answer :   Brazil

The Amazon and its tributaries flow through the countries of Peru, Bolivia, Venezuela, Colombia, Ecuador, and Brazil before emptying into the Atlantic Ocean 6, 437 kilometers (4,000 miles) from the Amazon's headwaters high in the Andes mountains of Peru.

Correct Answer :   Cambodia

Correct Answer :   Mariana Trench

The deepest trench in the world, the Mariana Trench located near the Mariana Islands, is 1,580 miles long and averages just 43 miles wide. It is home to the Challenger Deep, which, at 10,911 meters (35,797 feet), is the deepest part of the ocean.

Correct Answer :   Cools downs the temperature of water

During La Niña, it's the opposite. The surface winds across the entire tropical Pacific are stronger than usual, and most of the tropical Pacific Ocean is cooler than average. Rainfall increases over Indonesia (where waters remain warm) and decreases over the central tropical Pacific (which is cool).

Correct Answer :   10° channel

The 10° channel is a channel that separates the Andaman Islands and Nicobar Islands from each other in the Bay of Bengal. The two sets of islands together form the Indian Union Territory (UT) of Andaman and Nicobar Islands.

Correct Answer :   South Asia

Pakistan, populous multiethnic country of South Asia. Having a predominately Indo-Iranian speaking population, Pakistan has historically and culturally been associated with its neighbours Iran, Afghanistan, and India.

Correct Answer :   Boston

The 'Freedom Trail' is a 2.5-mile long passage that offers a rich insight into the American Revolution. We can find this US city in Boston. The 'Freedom Trail' starts from Boston Common (America's oldest public park) and ends at the USS Constitution in the Charlestown Navy Yard.

Correct Answer :   Stockholm

The Nobel Prize Museum (formerly the Nobel Museum [Swedish: Nobelmuseet]) is located in the former Stock Exchange Building (Börshuset) on the north side of the square Stortorget in Gamla Stan, the old town in central Stockholm, Sweden.

Correct Answer :   Hawaii Islands