The answer to this question is B
Nomads were the peoples who use to move from place to place by following animal voyages and vegetable cycles to find food. Nomadic culture and society apparently important because they manifest non-progressive development. Basically, Nomads are divided into three categories a. nomadic hunter-gatherers b. pastoral nomads c. Trader nomads.
The technology of Nomadic pastoralism is mainly animal husbandry, horticultural by the use of agrarian technology. Normally, this practice includes a good deal of knowledge about animal husbandry and land transportation technology. Whereas Trader nomads involved in small trading activities from one place to other which includes the trade of crops and goods. As these nomads use to wander from one place to another they use to exchange the cultural pattern such as technology, goods, crops with the inhabitants of that areas. Such exchange also results in a transmission of disease from one zone to other with these nomads.
People with similar physical characteristics--to seek comfort people will find others who look similar to them to create immediate common ground.
This tendency in humans explains why people tend to seek out homogeneous groupings. We seek what we know and therefore we are most comfortable. This behavior can be exploited to create the 'isms' of society like racism or sexism. <span />
Byzantine last 1000 years longer.
