Why are some questions you have about the oxygen cycle? (It's for the same thing as the question about the nitrogen cycle. Don't ask me "what is the oxygen cycle?" I already have that)

Which are results of technological advances? increased people's exposure to new ideas created a global culture valued by people around the world brought harmony to diverse groups of people reduced the number of people living in rural areas

Which country is currently the most populated country in the world? a. india b. china c. mongolia d. indonesia

What are the answers for the following questions?