The three correct adaptations that early humans made during the last ice age to survive varied environments are:
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Worked in larger networks of communities - Collaborating and forming larger social groups would have helped with resource sharing and protection.
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Made stone tools such as hand axes - The development and use of tools were essential for hunting and gathering, allowing early humans to efficiently process food and defend themselves.
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Used fire for heat, protection, and cooking - Fire was crucial for survival, providing warmth in cold conditions, protection from predators, and a means to cook food, making it more digestible and safe to eat.