Final answer:
The variety of foraging strategies is defined by the subsistence strategy of hunting and gathering in which people rely on natural resources for food.
Step-by-step explanation:
The variety of foraging strategies is defined by the subsistence strategy of hunting and gathering. In this strategy, people rely on the natural resources available in their environment such as gathering fruits, nuts, berries, and roots, hunting and trapping wild animals, and fishing in rivers and lakes. This subsistence strategy is practiced by various societies, although some may combine it with other strategies like farming or herding.