Which right involves retaining a share of ownership without selling?

The correct answer reflects the concept of retaining an ownership interest without the necessity of selling it off. When one has the right to use a property, they are allowed to occupy or utilize it while still holding ownership. This contrasts with other options, where different implications exist in terms of ownership. A lease, for example, typically involves transferring the right to use the property to another party for a specified period, which includes relinquishing some control and usage rights. Similarly, giving away property would mean transferring ownership entirely to someone else, while refusing ownership often implies a denial of rights being utilized at all. Therefore, the right to use involves the retention of ownership while allowing one to partake in benefits associated with that ownership, making it the best choice in this scenario.