Today fewer than 250,000 people make their primary living from food foraging. where do the remaining food foragers often live?

a. in remote regions where inhabitants have never had any contact with other societies or civilizations
b. in environments (cold places, forests, islands) where other strategies for food production are not sustainable
c. in very poor countries where agriculture is too expensive
d. on plantations where they work for wealthy landlords

b. in environments (cold places, forests, islands) where other strategies for food production are not sustainable

Explanation:

Food foraging is an act of searching, finding and harvesting wild foods. Other name for it is gathering free food. When people in cold places, forests or island where foods are not available go for searching and hunting mushroom hunting. Sometimes people go hiking in the mountains to search for elusive morels, even they roam about picking apples from anyone's orchard, or picking berries, edible flowers, plums and dandelion greens.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.