The answer is Drive Reduction Theory. It is built on the notion that we are determined by basic biological needs like food, water, shelter. Needs motivate our behavior to search for homeostasis (balance) in our physiques. If we miss breakfast, we feel starving. The hunger need energies us to look for food so that we try to get rid of the starvation, as a result bringing us back to a homeostatic condition. These determinations can either be primary or secondary.
The writings of Ibn Battuta show us about cross-cultural interactions that he traveled the world and lived an exciting life. From travelling or visiting new cultures, you bring your own and creative new ones. That is what he created all the wonderful religions and traditions across the world. It also can bring about change to oppressed people like women.
Well the obvious answer would be to reproduce. So that they can have offspring
B) a water route to north america
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