Which of the following is a claim against property for unpaid debts?

A claim against property for unpaid debts is represented by liens. A lien is a legal right or interest that a lender or a service provider has in the property, granted until the debt obligation is satisfied. This means if a homeowner fails to pay taxes, mortgages, or other debts, a lien can be placed against their property, which serves as a guarantee for the payment of that debt.

In contrast, leases do not represent unpaid debts; instead, they outline the terms under which one party rents property from another. Licenses grant permission to use someone else's property but do not create an interest in the property itself. Easements provide a right of way over another's property and do not relate to debt. Therefore, among the provided options, liens are specifically designed to secure payment for debts owed, making them the correct answer.