Final answer:
A social system in which one female lives with multiple reproductive males is known as polyandrous. This is opposite to polygyny, where one male has multiple female partners.
Step-by-step explanation:
When one female lives in a reproductive unit with multiple reproductive males, we say the social system is polyandrous. In a polyandry mating system, a single female will have multiple male mates. Polyandry contrasts with polygyny, where one male mates with several females. The latter can be seen with resource-based scenarios, harem mating structures, or lek systems, all of which involve a male being the central reproductive partner to multiple females.