The correct response that identifies an example of a genocide caused by an ethnic conflict is:
Bosniaks and Croats were targeted by Bosnian Serbs during the Bosnian War.
This statement accurately reflects the horrific events during the Bosnian War, where Bosnian Serbs, under the leadership of figures like Radovan Karadžić and Ratko Mladić, perpetrated acts of genocide against Bosniaks (Muslims) and Croats, particularly exemplified by the Srebrenica massacre in 1995.