Final answer:
Beavers are known to be monogamous, forming long-term pair-bonds and raising offspring together.
Step-by-step explanation:
Among the animals listed, beavers are known to exhibit monogamous behavior. In the context of animal mating systems, monogamous refers to the practice where one male mates with one female, and they pair for a period of time which could be for a breeding season or for life. Beavers are a prime example of monogamous animals as they typically form long-term pair-bonds and raise their offspring together.