[Solved] What is one reason that the field of health psychology has emerged A) Being ill affects mood, and we need to understand this unidirectional effect. B) It is now well-known that many diseases have neurological origins. C) Our modern focus on health includes prevention, not just treating existing illness. D) Diseases such as AIDS can have a serious impact on cognitive functioning. Substantial Diversity: Significant variation within a group or population, encompassing attributes such as race, ethnicity, gender, age, sexual orientation, and beliefs. Sexuality: A complex aspect of the human experience that encompasses sex, gender identities and roles, sexual orientation, eroticism, pleasure, intimacy, and reproduction. Gender: The range of characteristics pertaining to, and differentiating between, masculinity and femininity, largely culturally and socially constructed. Sexual Activity: Behaviors involving the genitals aimed at deriving erotic pleasure, including intercourse and masturbation, among others.