Answer:
Africans passed down their history orally instead of writing it down.
Explanation:
Many African tribes never developed a system of writing on their own, so it was passed down orally.
At the beginning of the 20th century, Bosnia went through a crisis because because the Austro-Hungary empire decided to annex the country, even though it was officially under Ottoman rule.
Answer:
"Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). ... The extreme astrophysical event of a supernova can produce enough energy to fuse nuclei into elements heavier than iron."
Explanation:
