Which defines the weimar republic?

the name proposed for the new german nation by the rising nazi party
the state in southern germany that dominated german politics after wwi
the name for the democratic german government from 1919 to 1933
the union of the countries of germany and austria following wwi

The name for the democratic German government from 1919 to 1933  defines the Weimar Republic.

Explanation:

Before the advent of Nazi rule, Germany was governed by a democratic set up from 1919 to 1933 and it was named after a town called Weimer. This was the place where the new government of democratic Germany was formed by the national assembly and it has been named as the Weimar Republic.

An election system has been put in place to elect the representatives under the parliamentary democracy system. The societal and financial mismanagement has totally destabilized the Weimer Republic besides the First World War. This made the fall of the Weimer Republic and that is the beginning of the Nazi rule in the year 1933.

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.