The Final Solution was a plan developed by the Nazi regime during World War II to systematically exterminate Jewish people, as well as other groups deemed undesirable by the Nazi ideology, such as Romani people, homosexuals, and people with disabilities.
Eugenics is the idea that certain groups of people are inferior and should be eliminated from the gene pool, while other groups are superior and should be encouraged to reproduce. The Nazi regime used eugenics as a justification for their policies, claiming that they were trying to create a "master race" of people who were physically and mentally superior.
The Final Solution was an example of eugenics in action because it was an attempt to eliminate entire groups of people who were deemed undesirable by the Nazi regime. The Nazis believed that the Jewish people, as well as other groups, were inferior and should be eliminated from the gene pool. This is a clear example of eugenic ideology put into practice on a massive scale.