The city of Chicago would appear larger and with more detail on a map with a scale of 1:50,000 than on a map with a scale 1:1,000,000 true or false

The answer to your question is d. convection currents. hope this you.

Because they have free health care and is a very nice country : )

Many foreign companies buy/build hotels in areas therefore most of the profit from tourism goes to these companies rather than the local economy or local people. 
also, these foreign companies might only employ foreign workers with experience meaning they receive more pay whereas local people would be employed for low skilled jobs and lower pay. 

thats all i can think hope it : )