Q Link the following four ideas to explain or tell the story behind one theory explaining why cultural evolution occurred: (Don't try to match this to one of the theories described in the text--just use common sense to tie the ideas together.) 1. A shift from foraging to food production as a group's primary subsistence strategy 2. Population growth and increasing population density 3. The carrying capacity of the environment 4. "Necessity is the mother of invention"
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