[Solved] Why do marketers study consumer behaviour? Erotic Plasticity: The degree to which an individual's sex drive, sexual preferences, and sexual identity can change throughout their lifetime. Evolutionary Psychology: A theoretical approach in psychology that explains human thoughts and behaviors in terms of natural selection and adaptation. Social Learning Theory: A theory that suggests people learn new behaviors through observational learning of the social factors in their environment. Handedness: Handedness refers to the preferential use of one hand over the other for performing tasks, influenced by genetic, biological, and environmental factors.