A biological influence on homosexuality is most clearly seen from evidence of
A) sexual relations between same-sex partners in several hundred different animal species.
B) an increase in same-sex attraction among women who had fraternal twin brothers.
C) the increase in homosexual and bisexual people among males with domineering mothers.
D) the link between sexual orientation and the levels of sex hormones currently in a person's blood.

Question

Quizplus · Accepted Answer

Sexual behaviors, including same-sex relations, have been observed across a wide range of animal species, indicating a natural biological component to these behaviors. This evidence supports the idea that homosexuality can have a biological basis, rather than being solely a social or psychological phenomenon.

A Biological Influence on Homosexuality Is Most Clearly Seen from Evidence