Which court is primarily concerned with matters relating to wills?

The probate court is specifically designed to handle legal matters concerning wills, estates, and the administration of deceased individuals’ assets. This court ensures that a decedent's wishes as expressed in their will are honored and provides a legal framework for the distribution of their property. It oversees the process of validating wills, appointing executors or administrators to carry out the terms of the will, and ensuring that debts and taxes are settled before distributions are made to heirs.

In contrast, criminal courts focus on cases involving criminal offenses and the prosecution of individuals accused of those crimes. Circuit courts generally handle a wide range of civil and criminal cases but do not specialize solely in wills or estates. Family courts deal primarily with family-related issues, such as divorce, child custody, and domestic relations, leaving matters of wills and estates to the probate court. Therefore, the probate court is the correct answer as it is the designated venue for dealing with matters surrounding wills and estates.