Which law aimed to provide vocational training primarily aimed at non-white South Africans?

The Bantu Education Act is the correct choice because it was specifically designed to provide an education system that focused on vocational training for non-white South Africans. Introduced in 1953, this legislation sought to control the education of black South Africans and ensured that their education was aimed at preparing them for a life of labor rather than higher education or professional careers. The underlying ideology of the act reflected the apartheid regime's belief in the superiority of white South Africans and the need to maintain the socio-economic hierarchy that favored them.

In contrast, the other laws listed, such as the Prohibition of Mixed Marriages, Population Registration Act, and Morality Act, do not focus on education or vocational training. The Prohibition of Mixed Marriages was aimed at preventing marriages between different racial groups, reinforcing racial segregation. The Population Registration Act categorized the population into racial groups, forming the basis for many apartheid laws and practices but did not provide for vocational training. Similarly, the Morality Act encompassed regulations governing sexual conduct and personal relationships but did not concern itself with education or vocational training. Thus, the Bantu Education Act stands out as the law that specifically targeted non-white South Africans for vocational training, making it the correct choice.