Why do some animals use urine or musk to mark their territories?

Animals use urine or musk to mark their territories as a way of communication and to establish boundaries. These scents contain chemical signals that convey information about the individual, such as its identity, reproductive status, and health. By marking territory, animals can deter rivals, attract mates, and reduce physical confrontations, thus enhancing their chances of survival and reproductive success. This behavior is particularly common in mammals and helps maintain social structures within species.