How have diamonds contributed to civil wars and unrest in Angola?

In the early 1990s several rebel groups turned to natural resource extraction to pay for war. A key form of this is rebel diamond production, commonly referred to as conflict diamonds, which is widely perceived as being highly beneficial to insurgent organisations. Yet in the Angolan Civil War (1992–2002

Explanation:

all three options are correct

polar areas, such as antarctica or the south pole.