Final answer:
Humans' diets during the ice age depended on their environments, with those in colder areas relying more on meat consumption. Fire played a crucial role in cooking and survival. As the climate warmed, diets expanded to include more marine life.
Step-by-step explanation:
During the ice age, the diets of humans varied by region and were heavily influenced by the environments in which they lived. Those in warmer areas consumed a diet rich in nuts, fruits, berries, wild grains, and honey, whereas in colder regions, there was a heavier reliance on meat, fish, and animal protein due to the scarcity of edible plants. An important aspect in the lives of these early humans was the use of fire for cooking and warmth, which may have played a role in their survival and cognitive development. As the climate began to warm and the ice retreated, new opportunities arose for exploiting marine life, which supplemented the human diet and allowed for further expansion and adaptation.