Answer: iron-making
Explanation: The varied climates and natural resources of Africa offered opportunities for developing different lifestyles. By 500 B. C., the Nok people of West Africa had pioneered iron-making technology.
<span>a.Historical perspectives change over time depending upon the biases of the writer.
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Succession of states is a theory and practice in international relations regarding successor states. A successor state is a sovereign state over a territory and populace that was previously under the sovereignty of another state. The theory has its roots in 19th-century diplomacy.[1] A successor state often acquires a new international legal personality, which is distinct from a continuing state, also known as a continuator, which despite change to its borders retains the same legal personality and possess all its existing rights and obligations (such as a rump state).