Final answer:
The Nazis targeted homosexuals by sending them to concentration camps, making them wear Pink badges for identification, and the Gestapo monitored them.
Step-by-step explanation:
The Nazis treated homosexuals with extreme persecution and considered them a threat to their goal of racial purity. Homosexuals were sent to concentration camps and were forced to wear Pink badges to differentiate them from other prisoners. The Gestapo, which was the official secret police of Nazi Germany, was responsible for keeping surveillance on them among other groups deemed undesirable by the regime.