[Solved] The null hypothesis behind a simple multiple-group analysis of variance is of the form: Mature and Affluent: Describes individuals or demographics that are both financially well-off and have reached a stage of emotional and mental development. Natural Selection: A process in evolutionary biology where organisms better adapted to their environment tend to survive and produce more offspring, driving evolutionary change. Erotic Plasticity: The degree to which an individual's sex drive can be changed by cultural, social, and situational factors. Reproductive Potential: The biological capability of an individual or species to produce offspring, contributing to the genetic diversity of a population.