Which answer best describes nomadic herders of domesticated animals?

Herding is the practice of caring for roaming groups of livestock over a large area. There are different types of herding. Nomadic herders roam in small tribal or extended family groups and have no home base. Nomads live in arid and semi arid parts of Africa, Asia and Europe, and in the tundra regions of Asia and Europe.

In Africa, nomadic herders care for cattle, goats, sheep and camels. In the tundra, they usually herd domesticated reindeer. Other animals managed by nomadic herders include horses, musk-oxen, and yaks. For many nomads, their herds provide meat, milk, and hides for their own use, as well as for trade.

In Africa, the United Nations estimates that nomadic herders are responsible for more than $100 million in economic activity every year.

Other types of herding is called semi-nomadic where herders live a more settled life than nomads having a home base but still follow their animals for long periods of time. Transhumance is another type of herding defined as a seasonal migrant pattern for herders, usually moving to cool highlands in the summer and warmer lowlands in the winter. Unlike nomadic herders, these herders move between the same two locations, where they have permanent settlements.

A more prevalent type of herding today is called ranch herding, defined as the care for large-scale livestock on designated ranches.