Apartheid is best described as the system used by

Apartheid is best described as the system used by the South African government. Apartheid was a system of racial segregation in South Africa enforced through legislation.

The question is asking to complete the said statement and comply the said question and in my research and further understanding, I would say that the answer to this question is the South African Government. I hope you are satisfied with my answer and feel free to ask for more 

Political forces often influence public opinion.