2. The invention of the wheel was important because it made transportation much easier and quicker. The use of fire was important because it was used for the cooking of food. Ability to cooperate in mutually beneficial project was important because it allowed for people to trust each other. Domestication of animals was important because it led to farming.

3. The use of metals is a measure of humanity¡¯s progress toward a more complex civilization because over a period of time, the use of metals allowed for the invention of buildings and eventually the creation of cities. This definitely leads to a more complex civilization because many advancements were made and cities became more a

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