What role did the tigris and euphrates rivers play in the development of civilization? they enriched the soil and farmers grow food surpluses. they enabled the people of mesopotamia to become sea traders. they provided enough water for farmers not to have to irrigate their crops. they isolated the people of mesopotamia from other regions.

They provide enough water for farmers not to irrigate their crops.

Explanation:

The Euphrates and the Tigris are rivers that regularly spilled. Residents of Mesopotamia have developed a high degree of organization. They used every spill of the Euphrates and the Tigris.

For this period, they built a soft way of irrigation for their agricultural property. Thanks to these rivers, the first civilization developed in the area.

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.

the answer is a. harriet tubman was a nurse on the battlefield.