[Solved] Many biologists believe that a mass extinction in currently in progress, but can be prevented by responsible human intervention. Polyandry: A mating system where a female has multiple male partners over a breeding season, uncommon among mammals but observed in some species. Eusocial Group: A hierarchical social structure seen in certain animals, like naked mole rats and bees, characterized by cooperative care of offspring and division of labor. Monogamous: Pertaining to a mating system or relationship in which an individual has only one partner during their lifetime or at any one time. Monogamy Hypothesis: The theory that monogamy can evolve as a mating strategy that offers reproductive and survival benefits under certain environmental or social conditions.