North Korea is the country that borders both China and South Korea.
Answer:
It has been used for transport of materials and travel for humans, and it has also been used in fairs for rides
Que está compuesto de varias disciplinas
Cause they didn't put their hands up and got knocked out
The answer to this question is: Valid
For example, let's say that a researcher wants to study the psychology of motivation as a variable.
In this case, motivation does not possess a measurable standard that could be used as data, so the researcher could only predict thte amount of motivation through the amount of job done (but this data is reliable because motivation is only on of the many factors that may influenced it)