The correct alternative is <em>"Identification of cities, states and countries".</em>
A political map must have states and countries marked on it, also its capitals. But on the other hand, there's no need for the presence of topography and boundaries, because it would include the political boundaries, not the natural ones.
Also, labels for continents and oceans is not a characteristic of a political map, nor the key for natural resources.
Answer:
From 1821 to 1846, as more and more traders took their goods over the Santa Fe Trail, it became an international commercial highway used by Mexican and American traders. The 900-mile trail connected Old Franklin, Missouri to Santa Fe and was the lifeline linking the New Mexico Territory to the eastern United States.
<span>During the industrialization of the United States in the 19th century, immigrants were housed in old houses or warehouses, which were bought and divided to be distributed among the families. These buildings did not meet all living standards completely, for example they were very hazardous in the case of a fire, but they were enough for the families trying to earn a living for themselves. These low-cost dwellings were referred to as tenements.</span>
I believe it is because that is where jobs were, and where family and friends were.
