Answer:
b. in environments (cold places, forests, islands) where other strategies for food production are not sustainable
Step-by-step 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.