By forming various organizations.
The European Union, for example, unites Europe (Minus Britain these days) under one banner, thus preventing fighting.
A more direct example is the North Atlantic Treaty Organization. NATO protects the "North Atlantic" and Europe from terrorists and invading countries by using the combined military strength of multiple nations.
<span>First Transcontinental Railroad -
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Here's a link that should give you all of the information you need about the transcontinental railroad.</span>
It's Fresco. Here is the definition of fresco: a painting done rapidly in watercolor on wet plaster on a wall or ceiling, so that the colors penetrate the plaster and become fixed as it dries.
The answer is B. Habeas Corpus
