The statement that best identifies an example of genocide caused by an ethnic conflict is: "Bosniaks and Croats were targeted by Bosnian Serbs during the Bosnian War."
This reflects the systematic targeting and violence against specific ethnic groups, which is characteristic of genocide, particularly in the context of the Bosnian War (1992-1995). The Srebrenica massacre, where thousands of Bosniaks were killed in 1995, is often cited as a key instance of genocide within this broader conflict.