0) Which of the following correctly describes the Warring States period? Seven states conquered others, fracturing the Zhou kingdom.
Each state became its own dynasty.
The Zhou dynasty divided its kingdom into seven states. The
states fought nomadic tribes at their borders, expanding the
kingdom.
Seven states attacked the Zhou capital, overthrowing the
dynasty, then competed to become the next dynasty.
0 O Seven states competed for land and power. The Qin state
ultimately captured the Zhou capital and conquered the other
states.

answer; /// i believe that the correct answer is (divison of labor);

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.

the industrial development of cities in the ruhr area in the nineteenth century is described. the research was based on english and german language sources. several factors that shaped growth and paths of the cities were categorized and analyzed. they are locations, resources, traditions, entrepreneurs, and technological developments. locations and resources were the most important among them; other factors may be regarded as consequences from locations and resources. among the cities, bochum, essen, gelsenkirchen, and dortmund had the richest resources and most favorable locations in the transportation network and grew to be the largest cities in the ruhr area near the end of the nineteenth century. riverside location was also a favorable factor for the development, as shown in the development of duisburg on the confluence of rhine and ruhr. resource distribution can explain the rise of textile industry, metallurgical industry, and coal and iron industries, and the northward progression of the mining industry. tradition was an important factor for cities such as krefeld, barmen, elberfeld, solingen, and remscheid, which experienced development based on their traditions through the nineteenth century. various entrepreneurs exerted influences within and beyond the local level over the ruhr area. technological development stimulated the northward progression of the mining industry and the deep connection between the coal and the iron industries.