I believe it is B because for a monopoly it has no close substitute and is protected by a barrier that prevents other firms from selling that good or service
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Pan Africanism was opposed to outside
political interference and colonization of Africa. It advocated for
independence and self-reliance of African states that would independently
provide for their citizenry. Proponents of the ideology were opposed to external political and economic
involvement on the continent.
The answer is: Space
Space will include all abiotic components that exist within a certain geographical location (this include things such as water, air, foods, land, caves, etc) .
Even though space indeed provide all organisms need to survive, All of these components in the space wouldn't necessarily guarantee the organisms' survival itself. Those organisms still need to compete with one another in order to acquire those resources.