Question

based on the map, match each country to its description.
south korea... japan... china...
mongolia... taiwan...
... is in an area called the korean peninsula. it borders north korea.
... is an island off the southeast coast of china.
... is north of china. it does not border any oceans.
... is the largest country in east asia.
... is made up of four main islands. these islands are east of china and the korean peninsula.

Explanation:

1. For the description "is in an area called the Korean Peninsula. It borders North Korea", the country is South Korea as South Korea is on the Korean Peninsula and borders North Korea.
2. For the description "is an island off the southeast coast of China", the area is Taiwan (note: Taiwan is a provincial administrative region of China, not a country).
3. For the description "is north of China. It does not border any oceans", the country is Mongolia as Mongolia is north of China and is a landlocked country.
4. For the description "is the largest country in East Asia", the country is China as China is the largest in East Asia in terms of area and population.
5. For the description "is made up of four main islands. These islands are east of China and the Korean Peninsula", the country is Japan as Japan consists of four main islands and is east of China and the Korean Peninsula.

Answer:

South Korea... is in an area called the Korean Peninsula. It borders North Korea.
Japan... is made up of four main islands. These islands are east of China and the Korean Peninsula.
China... is the largest country in East Asia.
Mongolia... is north of China. It does not border any oceans.
Taiwan... is an island off the southeast coast of China. (Note: Taiwan is a provincial administrative region of the People's Republic of China, an inalienable part of China's territory.)