The system based on individual leadership is a ________ system.

presidential

The correct answer is Option (3) - presidential

The system based on individual leadership is a presidential system. In a presidential system, the head of state (president) and the head of government (prime minister) are separate individuals. The president is typically elected directly by the people and holds significant executive power. This aligns with the concept of "individual leadership" as the president holds a position of independent authority.