Final answer:
The answer to why homosexuality was an integral part of ancient Greek society is D. Men were separated from women for long periods of time.
Step-by-step explanation:
The answer to why homosexuality was an integral part of ancient Greek society is D. Men were separated from women for long periods of time. In Greek culture, there was no concept of "heterosexual" versus "homosexual," and sexual attraction was assumed to exist between men as easily as between men and women. Bisexuality was common, particularly among men in the upper social ranks. Adult men often "adopted" younger males to mentor them and carry on sexual relationships, as seen in the barracks society of Sparta. Furthermore, homosexual bonds were believed to strengthen warriorhood, with the Sacred Band of Thebes being a prime example where male couples formed a formidable army, fighting fiercely out of honor and protective feelings for their partners.