20 animal was the most significant animal to many american indian nations of the great plains and it demise was connected to the demise of the american indian people of the great plains american bison texas longhorn proghorn cougar

the answer is a, the american bison

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

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.