Final answer:
The remains of victims of the first genocide, often known as the Armenian Genocide, were left unburied or in mass graves by the Ottoman Empire, with little done to recover or memorialize them. In the Holocaust and Rwandan Genocide, efforts were made post-conflict for respectful burials and erecting memorials. The treatment of American Indian remains varied, with many burial practices disrupted due to colonization.
Step-by-step explanation:
When discussing the first genocide of the 20th century, it is generally accepted that this refers to the Armenian Genocide that occurred during World War I. The remains of the victims were often left unburied, scattered in the desert or disposed of in mass graves. It wasn't until much later that any efforts were made to recover or memorialize the victims, and in many cases, these remains were lost due to neglect or deliberate efforts by the Ottoman Empire to cover up the atrocities.
Regarding the broader concept of genocide such as the Holocaust or the Rwandan Genocide, there have been significant efforts made post-conflict to dignify the victims. This has often involved exhumation and proper burial, the creation of memorials, and international recognition and education to prevent future genocides. For instance, after World War II, the remains of Holocaust victims were buried in mass graves or individual graves, and many memorials were erected to honor those who perished.
In contrast, the treatment of the remains of American Indians, following the pattern of disease, warfare, and policies that some have labeled genocidal, varied widely, with many burial practices being disrupted by the impacts of colonization.