At first (until July 1934) the Nazi concentration camps were run by the SA (Stormtroopers, 'Brownshirts'), but from mid 1934 they were run by the SS. Later the SS was also in charge of the 'Final Solution' and ran the extermination camps in Poland. The concentration camps were run by the SS-Totenkopfverbände (SS Death's Head units).
They were chosen from within the SS staff at concentration camps.
The SS did.
the SS
The SS ran the concentration camps and extermination camps and organized the holocaust.
SS death's head
They were run by the SS.
The SS stood for Schutzstaffel and were the Gestapo and ran the concentration camps.
Yes.
No, they were members of the SS and wore SS uniforms.
the main role of the SS during the Holocaust was to run the concentration camps.
The prisoners had to pay for the camps, with their labour and/or possessions - and leave the SS with a profit.