Question

cape town, south africa - relative location
north of mexico city
southwest of johannesburg
east of beijing
west of cairo

Explanation:

Cape Town is in South - Africa. Johannesburg is also in South Africa, and Cape Town is located southwest of Johannesburg. Mexico City is in North America, Beijing is in Asia, and Cairo is in Africa. The relative locations given in the other options are incorrect.

Answer:

Southwest of Johannesburg