Henry Ford develops what

Henry Ford was an American automobile manufacturer who created the Model T in 1908 and went on to develop the assembly line mode of production, which revolutionized the automotive industry. As a result, Ford sold millions of cars and became a world-famous business leader.

Explanation:

The correct answer that fills in the blank was Production line

Explanation:

Henry for created the productoin line in 12-1-1913 so workers can create auto mobiles way faster. It used to take workers 12 hours, but Ford reduced it to 4 hours.

Plus I did a project of Henry Ford in third grade (I passed)

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.