Can you “prove” homosexuality is a choice? No. You can’t prove a choice. A choice only exists in a persons mind. It is not empirical or tangible. It can not be observed, tested or reproduced.
However if homosexuality is genetic, this you can “prove” or disprove. You can locate the gene or gene sequence that makes people homosexual. DNA is empirical and tangible. It can be observed, tested and reproduced.
Meanwhile why don’t you homosexuals stop fucking small children. You are some sick fuckers.