In what type of property ownership do owners have unequal shares but may not specify their ownership arrangement?

The correct answer is Tenancy in Common because this ownership arrangement allows two or more individuals to hold title to a property simultaneously, with each owner having the ability to own an unequal share of the property. In a tenancy in common, the specific ownership percentages do not need to be defined in the ownership agreement, which distinguishes it from other forms of co-ownership like joint tenancy, where owners typically share equal shares and have rights of survivorship.

In a tenancy in common, if one owner wishes to sell their share, they can do so without needing concurrence from the other owners, which is a unique feature of this type of ownership. Additionally, each tenant in common's share can be willed to heirs or sold independently, providing flexibility that is not present in other ownership arrangements.

This distinguishing characteristic of unequal shares coupled with the lack of requirement for a specified arrangement is what makes tenancy in common the appropriate choice in the context of the question.