I believe its because of the axis of the earth.
Answer:
it has to be b because of the other ones are wrong
The answer is 4 is helps you estimate the distance between two places.
Luzon straight is the Island that lies in between the south chin sea and the pacific Ocean
Answer: china
Explanation: i don’t have the numbers but if you search up country with highest population it should tell you. sorry i couldn’t help more :(