Answer:
Humans
- learned to create and control fire for warmth during cold weather
- switched to eating what was available when main food source became limited
Humans were able to create and control fire which allowed us to survive in colder areas because the fire kept us warm. The fire was also very useful to keeping predators away and allowed us to cook food which made more things edible.
Humans also have the ability to switch to whatever food is available when our main food source is depleted. For instance, if there is no more fish in a fishing town, the people would switch to vegetables and crops.
Animals
- starved when main food source became limited
- had no ability to control the environment
Animals are not very good at changing diets so they tend to starve when their main source of food is limited. For instance, if there are no more prey for a lion, it doesn't switch to grass. It would just starve.
Animals also had no control over the environment which meant that they were adversely affected by weather conditions that they had no natural protection against.