I believe they were all founded to preserve supplies for wartime.
I think that they will have a more futuristic touch and if you have seen the movie After Earth something like that
<span> Periodization can help historians know when an event occured. This can also help historians learn the cause and effect of another time in history.</span>
In the late 20th century, immigrants who moved from former colonies to their former imperial nations tended to settle in metropoles where jobs were available. The correct option among all the options that are given in the question is the second option. People needed money to survive. I hope the answer helps.
