How did the white South Africans keep the black South Africans from becoming educated, wealthy and united?

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

In a world that produces enough food for every human, why is the distribution of food consumption and production so unequal? in a few sentences, explain why production and consumption of food is lower in the least-development countries (ldcs).

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine