There are actually six major religions in North Korea. The percentages of the 23,301,725 population that believe in the following religions are:
71.2% Atheist
12.9% Cheondoism
12.3% North Korean Shamanism
2.1% Christianity
1.5% Buddhist
0.0001% minghiusm
I'm not a mathematician so I couldn't narrow it down to the top three. But Hinduism is not a major or even minority religion in North Korea.
Buddhism.
Seoul is not a major city in North Korea, it is in South Korea. An important major city in North Korea would be Pyongyang.
The major political party in North Korea is The Supreme Peoples Assembly.
The major events are Asia and North Carolina
Amnok_River
The Korean Civil War is a major event where North Korea and South Korea battled. In the end North Korea won. The United States helped South Korea while China helped North Korea
I'm not sure about North Korea, but Buddhism is a major religion in South Korea. South Korea is also very Christian.
84% to 96% are Shinto and Buddhists
North Korea is a Low Developed country and has been said to have major economic crisis.
One major challenge pertaining to the reunification of North and South Korea would be the mass unemployment and poverty of those in the North. That would impact the economy of South Korea in a major way.
hills and mountains
North Korea has rivers, active volcanoes, lakes, mountains, deep valleys and caves also.