Sexual orientation is a multidimensional concept involving

A) erotic attraction, affectional relationships, sexual behavior, erotic fantasies, and emotional attachments.
B) only the gender of sexual partners.
C) homosexuals.
D) cosmetic genital surgery.

Sexual orientation is a complex concept that goes beyond just the gender of sexual partners. It involves a range of factors, including but not limited to, erotic attraction, affectional relationships, sexual behavior, erotic fantasies, and emotional attachments. Therefore, option A is the most appropriate choice as it captures the multidimensional nature of sexual orientation. Option B, only focusing on the gender of sexual partners, is too narrow and does not fully encompass the concept of sexual orientation. Option C is not a comprehensive explanation of sexual orientation as it only refers to one specific aspect of it. Option D is not relevant to the concept of sexual orientation as it refers to a cosmetic surgery procedure.