Explain how, in 19th century europe, ideology struggles led to new government unifications and uprisings.

The Enlightenment was an academic and philosophical movement that predominated among European residents in the during the end of the 18th century and the beginning of the 19th century. It was a period of great scientific developments and political reforms, as major representatives from the movement prioritized "reasoning" over other forms of moral law (The Catholic Church).

This movement was the catalyst for what would become the French Revolution, as people would turn against the crown due to their evident misgovernment and favoritism for nobility.

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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.