They were on separate landmasses, but I'm not really sure this answers the question, you should try just asking google.
The closer you get to the city the higher buildings get such as apartment buildings due to price of land
If you would like see if it is okay see if you can write about Obama's goodbye message. Hope this helps! :)
Answer:
The troposphere
Explanation:
It begins at the surface of the earth and extends out.
