Which of the following is a landlocked country?

The correct answer is Austria, which is indeed a landlocked country in Central Europe. Being landlocked means that a country is entirely surrounded by land and does not have any coastal access to oceans or seas. Austria is bordered by eight countries: Germany, Czech Republic, Slovakia, Hungary, Slovenia, Italy, Switzerland, and Liechtenstein, all of which means it has no direct access to maritime shipping routes.

In contrast, Brazil is the largest country in South America and has an extensive coastline along the Atlantic Ocean, which allows for maritime trade and access to international waters. Australia is both a country and a continent, surrounded by the Indian and Pacific Oceans, and therefore has widespread coastline. Canada, spanning from the United States to the Arctic, also boasts a long coastline along the Atlantic, Pacific, and Arctic Oceans. These factors differentiate Austria as the only landlocked option in the provided choices.