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number 6 is answer 4 and for seven it is the first one

the bar kochba rebellion (132-135) against the roman empire, also known as the second jewish-roman war, was the second major jewish revolt in judea and the last of the great jewish-roman wars.

after the first jewish-roman war of the years 66-73, the roman authorities took measures to crush any new attempt of rebellion in judea. his political situation was modified and instead of a prefect a governor of praetorian rank was appointed, and in the ruins of jerusalem the seat of a complete roman legion, the legio x fretensis was established.

the political and religious direction of the jewish people was left in the hands of the sanhedrin, with initial headquarters in yavne.

the direct causes of the rebellion vary according to the source. the roman historian dio cassius (155-229) attributes the revolt to the decision of hadrian to found in the place of jerusalem a roman city called aelia capitolina (aelia by its own name and capitolina in honor of the roman god jupiter). on the other hand, the jewish sources, while recognizing this resolution as true, assign higher priority to the decrees dictated by hadrian that forbade the brit milah (circumcision), the respect of the sabbath and the laws of purity in the family.

hadrian's intention was to "civilize" and incorporate the jews once and for all into the greco-roman culture. for greek and roman culture, circumcision was an intolerable mutilation.

the jewish tradition tells in the midrash tanjuma a meeting between rabbi akiva and the governor turnus rufus, where he asked for an explanation about the circumcision.

an additional legion, the legio vi ferrata, moved to the province to maintain order, and work began in the year 131 after the governor of judea, turnus rufus performed the founding ceremony of aelia capitolina. a roman coin with the inscription aelia capitolina was struck in the year 132.

the tannaim rabbi akiva, who without being named nasi directed the sanhedrin, convinced the other members to support the imminent rebellion.

the jewish leaders carefully planned the second rebellion to avoid the numerous errors that had been committed in the first one. in the year 132 the rebellion led by bar kochba quickly expanded from modiim throughout the country, defeating the x roman legion based in jerusalem and destroying the xxii roman legion that had come from egypt.

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.