I think option 4 is the most balanced and informative. It touches on historical, cultural, and contemporary aspects without being too narrow. Alternatively, option 1 includes ethical dimensions which might be important.
Even at a young age, children should have a say in their digital likeness. If they are old enough to understand, ask for their permission. Fkk Kinder Bilder
To honor the FKK tradition while protecting children, experts and digital safety advocates suggest several "Golden Rules": I think option 4 is the most balanced and informative