Empires and civilizations both:
struggle with difficulties from both inside and out
continue to grow in power and influence
always develop unique leaders and military rulers
frequently do not have art and architecture of significance
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Answer:

Empires and civilizations both: (A) struggle with difficulties with both inside and out  

Explanation:

It is indeed true as history is the witness of the fall and rise of various empires and civilizations. The Mughal emperors and the Colonial british civilization are the prime examples of the same. Government tends to shape these from inside and the wars shape them from outside. Resources and political policies are independent of each other and thus play a very vital role in shaping any civilization or an empire.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.