How and why was the Great Wall built?

Builders of the wall always tried to use local resources, so the walls that crossed mountains were made from stone, and the walls that crossed the plains were made from rammed earth. The much later Ming Dynasty built a stronger wall by using more bricks and stone instead of rammed earth like some of the first. Great Wall has been built and rebuilt for three main purposes: as kingdom border defenses, to defend China's northern border, and for tourism.

Explanation:

the process is called revolution because it was a process of great economic-social transformations that began in england in the xviii century.

the industrial mode of production spread throughout much of the northern hemisphere throughout the xix and early xx centuries.

the effect of this revolution was the distance between the countries, with respect to economic and political power.   after all, not all industrialized at the same time, remaining in the condition of suppliers of raw materials and agricultural products to the industrialized countries.

these differences mark to this day the nations of the world that are divided between developed and developing countries. one way to measure whether a country is advanced is to assess how industrialized it is.

whose power in the senate is equal to the power of the speaker of the house?