[Solved] The total amount of living material in an ecosystem is referred to as ____. A)biomass B)a food chain C)mosaic D)a life zone Sexual Lives: This pertains to the aspects of human existence that involve sexual thoughts, desires, activities, and relationships. Erotic Plasticity: The degree to which an individual's sex drive and sexual preferences may be shaped by cultural, social, and situational factors. Sex Drives: The biologically driven force for sexual activity and expression. Gender Differences: Distinctions in characteristics, behaviors, or attributes typically associated with being male or female in a given society.