(iii) developing personal health-enhancing strategies for issues such as substance abuse prevention, nutrition, exercise, sexual activity, injury and disease prevention, and stress management, including traditional and contemporary strategies from American Indian cultures; (xiii) explaining the natural body changes of reproductive health; (xiv) explaining fertilization, conception, and how the baby's sex and inherited traits are determined; and (xv) comparing and contrasting how physical, mental, social, spiritual, and cultural factors influence attitudes about sexuality.