There is a higher population in the city than the countryside, which allows for more ideas to be developed and spread
I think it is population.
The foundation for both Christianity and Islam is Judaism - and as Judaism is also practiced today, it's the correct answer.
For example, the old Testament and is shared by both Judaism and Christianity and Islam also respects the prophets of Judaism (and Islam seems Jesus as a prophet too)
Explanation and answer:
A rain shadow is a patch of land that has been forced to become a desert because mountain ranges blocked all plant-growing, rainy weather. On one side of the mountain, wet weather systems drop rain and snow. On the other side of the mountain—the rain shadow side—all that precipitation is blocked.
In a rain shadow, it’s warm and dry. On the other side of the mountain, it’s wet and cool. Why is there a difference? When an air mass moves from a low elevation to a high elevation, it expands and cools. This cool air cannot hold moisture as well as warm air. Cool air forms clouds, which drop rain and snow, as it rises up a mountain. After the air mass crosses over the peak of the mountain and starts down the other side, the air warms up and the clouds dissipate. That means there is less rainfall.
You’ll often find rain shadows next to some of the world’s most famous mountain ranges. Death Valley, a desert in the U.S. states of California and Nevada, is so hot and dry because it is in the rain shadow of the Sierra Nevada mountain range. The Tibetan Plateau, a rain shadow in Tibet, China, and India has the enormous Himalaya mountain range to thank for its dry climate.
Answer - Race as a categorizing term referring to human beings was first used in the English language in the late 16th century. Until the 18th century it had a generalized meaning similar to other classifying terms such as type, sort, or kind. Occasional literature of Shakespeare’s time referred to a “race of saints” or “a race of bishops.” By the 18th century, race was widely used for sorting and ranking the peoples in the English colonies—Europeans who saw themselves as free people, Amerindians who had been conquered, and Africans who were being brought in as slave labour—and this usage continues today.
The peoples conquered and enslaved were physically different from western and northern Europeans, but such differences were not the sole cause for the construction of racial categories. The English had a long history of separating themselves from others and treating foreigners, such as the Irish, as alien “others.” By the 17th century their policies and practices in Ireland had led to an image of the Irish as “savages” who were incapable of being civilized. Proposals to conquer the Irish, take over their lands, and use them as forced labour failed largely because of Irish resistance. It was then that many Englishmen turned to the idea of colonizing the New World. Their attitudes toward the Irish set precedents for how they were to treat the New World Indians and, later, Africans.
