How did trade early africans develop advanced societies?

a.
it introduced them to new religions.

b.
it allowed them to make weapons out of iron.

c.
it made the gold they mined more valuable.

d.
it allowed them to trade natural resources for items they needed.

wetland functions are defined as a process or series of processes that take place within a wetland. these include the storage of water, transformation of nutrients, growth of living matter, and diversity of wetland plants, and they have value for the wetland itself, for surrounding ecosystems, and for people.

explanation:

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