Why did black south africans have to walk around with id's?

The author uses dialogue in this excerpt mainly

Explain in detail the events that led to the fall of the soviet union. explain the importance of the foreign policy shift from brinkmanship to détente during the cold war.be sure to include evidence to support your answer describe the challenges to nation-building that exist in africa today .

Prices for products became more affordable as a result of new forms of ,witch got things to market faster and cheaper