No, beavers are not marsupials. They belong to the order Rodentia and are known for their distinctive physical characteristics and behaviors.
Explanation: Marsupials, such as kangaroos and koalas, are a group of mammals characterized by giving birth to relatively undeveloped young that typically continue to develop in a pouch. Beavers, on the other hand, are part of the rodent family and are well-known for their ability to construct dams and lodges in aquatic environments. Their reproductive process involves giving birth to fully formed young, which is a significant difference from marsupials. Therefore, while both beavers and marsupials are mammals, they belong to very different categories within the animal kingdom.