Germany, Italy, and Japan had settled an alliance were they would not get into each other's way when expanding territory. The main reason why the axis powers were able to gain control of a large part of Europe was due to the League of Nations feeding Germany trying to keep peace and stop them without causing a war, sadly failing while in the process.
<span>c. proportional representation</span>
That's Rationalization my friend.
Hope this helps :D
The terrain is one thing they study, for example, if it is woody, or a plain, or rocky, or if it has mountains, etc.
they also study the plants, animals, etc and how they survive in the conditions
hope this helps