Which of the following articles is banned from entering the U.S.?

Dog and cat fur is indeed banned from entering the U.S. due to specific legislation aimed at protecting animal welfare. The Dog and Cat Protection Act prohibits the importation and distribution of products made from the fur of domesticated dogs and cats. This law reflects the country's commitment to preventing cruelty to animals and discouraging the trade in products that are derived from pets that may suffer in the process.

In contrast, leather products, toys and games, and medications can generally be imported into the U.S., although they are subject to various regulations and safety standards. Leather products must meet specific safety and environmental regulations but are not outright banned. Likewise, toys and games must comply with safety standards, such as those established by the Consumer Product Safety Commission, but they can be legally sold and imported if they meet these standards. Medications may require approval from the Food and Drug Administration (FDA) for safety and efficacy, but they are not banned outright as long as they conform to regulations.