The answer is C, sailboats could carry large cargos!
Urbanization brings noise pollution due to a larger population. This can be seen as one challenge. Another challenge is pollution such as plastic, gases, noise, etc due to the larger population. Also a big challenge is danger. You do not know the people as much in a larger town, therefore the danger to you is a lot more prominent.
The location's proximity to the equator (or how close it is to the equator) for example: the closer you are to the equator the hotter it is, the further away the colder
Answer:
number 6 would be the cultural region for Russia