The correct response that identifies an example of genocide caused by an ethnic conflict is:
"Bosniaks and Croats were targeted by Bosnian Serbs during the Bosnian War."
This response accurately describes the targeting and systematic killing of Bosniaks (Bosnian Muslims) and Croats by Bosnian Serb forces during the conflict, which is widely recognized as a genocide. The Srebrenica massacre, where thousands of Bosniaks were killed, is a prominent example of this genocide.