Final answer:
Nomads or migratory people move from place to place to find resources and survive, often influenced by the environment and availability of food.
Step-by-step explanation:
People who do not have a permanent home and who often move from place to place to survive are generally referred to as nomads or migratory peoples. These individuals or groups are known to migrate following available resources, such as herds of animals or seasonal growth patterns of edible plants, which greatly influences their patterns of movement. Historically, this lifestyle is tied to hunter-gatherer societies that forage over vast areas, and their migrations are often dictated by the scarcity or abundance of resources, climatic conditions, and the necessity to maintain a sustainable source of food. In modern times, these movements include a range of migrations, from the nomadic patterns of pastoral societies to the intricate migrations triggered by economic, political, or environmental factors.