Nomadic people move over long distances because _________.
A. By temperature they do not like to settle down in any one place.
B. They constantly look for good pastureland for their cattle.
C. They follow a lifestyle that is very different from the settled communities.
D. Economically they are too poor to own land.

Hint: We all know that nomads are people who do not live in one place but move from one area to another to earn their living. In many parts of India, we can see nomadic pastoralists on the move with their herds of goats and sheep, or camels and cattle.

Complete answer:
We know that pastoralism is a form of animal husbandry were domesticated animals known as livestock are released onto large vegetated outdoor lands (pastures) for grazing, historically by nomadic people that moved around with their herds. The species involved include cattle, camels, goats, reindeer, horse,s and sheep. Also, it is found in many variations throughout the world, generally where environmental characteristics such as aridity, poor soils, cold or hot temperature, and lack of water make crop-growing difficult or impossible. They are operated in more extreme environments with more marginal lands; means that the pastoral community is very vulnerable to global warming.
We also know that people who choose temporary settlements are called Nomads. A nomad is a person who changes his place of living from time to time mostly in search of new pastures for his livestock for their cattle.
So, the correct answer is Option B.

Note: We need to note that Nomadic pastoralism was a result of the Neolithic revolution and the rise of agriculture. During that revolution, humans began domesticating animals and plants for food and started forming cities. Nomadism generally has existed in symbiosis with such settled cultures trading animal products like meat, wool, hides, cheese, and other animal products for which manufactured items cannot be produced by the nomadic herders.