What kind of religion is most frequently found among foraging bands?

The answer is "shamanic".

Foraging bands are little social structures primarily constructed on family relationship that hunt and gather for nourishment, while being politically autonomous. Shamanism is a practice that includes an expert achieving altered conditions of cognizance keeping in mind the end goal to see and interface with what they accept to be a soul world and channel these supernatural energies into this world.

b) to encourage free trade

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