Final answer:
Nelson Mandela helped end the system of apartheid in South Africa by championing equal rights and leading the anti-apartheid movement.
Step-by-step explanation:
The individual who helped end the system of apartheid in South Africa was Nelson Mandela. Mandela, a political leader of the African National Congress (ANC) and the anti-apartheid movement, played a crucial role in fighting against racial segregation and advocating for equal rights for all South Africans. He was imprisoned for twenty-seven years but was eventually released and elected by the South African people to be their first president in the post-apartheid era.