The homosexual flag, often used as an overall LGBTQIA+ rights flag.
Homosexuality is the attraction to people of the same gender as your own. A homosexual boy would only be attracted to boys (sometimes referred to as gay), and a homosexual girl would only be attracted to girls(sometime referred to as lesbian/gay). From the LGBTQIA+ community, homosexuality is often the most well-known sexuality to those who aren't part of the community. As a result, the term "gay rights" is sometimes used in place of LGBTQIA+, as it's less of a mouthful to say.