The correct answer is c.: it served as the be boundary between North Korea and South Korea. The current line is in a similar place, but it's not a straight line, unlike the line running along the 39th parallel.
The answer would be c or a
Family
It is the primary socialization agent. The other three are peer, school and mass media.
The family is responsible for inculcating religiuos believes that forms the core of non-material culture. It is from the family, especially the first five years, that the notion of right or wrong is incalcated.
Non-material values are like love,hardwork, ethics,godliness,kindness.
Earthquakes and tsunami sometimes mountains form
The correct answer is true.
It is true that uneven heating of the Earth's surface creates three major climate zones. ( Tropical, Temperate, Polar).
The reason why this is correct is that the Sun is the main generator of the heat on planet Earth. Our planet radiates back that heat received from the Sun because the planet orbits around the Sun tilting every moment, changing the way the Earth receives the sunrays, and distributing the heat in the different topics and regions of the Earth. This means that the tropics receive more sun rays compared to the poles.
One good example is precisely the case of the Equator that when receiving the sun rays produces humidity in the air that is hot and goes into the atmosphere.