How does the president relieve a minister of his appointment in a presidential system of government

In a presidential system of government, the president has the power to relieve a minister of his appointment by unilateral action. This means that the president can remove a minister from office without needing the approval of the legislature or the judiciary. However, there may be certain constitutional provisions or legal requirements that the president must follow in order to remove a minister from office. For example, the constitution may require the president to provide a valid reason for the removal or to give the minister an opportunity to be heard before being removed.