Which famous South African's image can replace the question mark and why?
The famous South African should be
The name of the two first people
1. IDA Flo
2. Don Tox
IDA Flo is under "place" and now we switch place of the two and get Flo IDA. Add an R in between and we get Florida.
Same thing with Don Tox, switch place of the two and you get Tox Don. Add an O in between and you get Toxodon which is an extinct animal.
Now for the "thing" which is suppose to be represented by a famous South African
my mind immediately thought of Nelson Mandela (which doesn't look promising since no word can be made by Mandela(?)Nelson but then I thought of Elon Musk. And indeed if we switch place of the two: Musk Elon we can, by adding an M in between, create the word Muskmelon which is a "thing" (fruit)
Here is an image: