Happiness..... Is there any answer options?
Answer:
D.
Explanation:
European armies' increasing reliance on railways culminated in one of the world's bloodiest wars. ... In Vienna, then Berlin, then Paris, similar telegraphs clattered. ... In all, nearly 200,000 troops and 55,000 horses rode the rails to the front. ... Unlike the German lines, four-fifths of the French rail network was double-tracked, ... HOPE YA GET IT! :D
Proximity, which makes sense because mentally you're similar or physically so you're attracted to each other. They say opposites attract which is sometimes true but often times it's similar qualities that bring people together.
The waterways in the southern colonies were especially important because they<span> could ship goods from the interior of the south to the coast where they could be sent to Europe.</span>