The correct answer is Option B, "presidential." A system based on individual leadership is a presidential system.

Explanation:

The system based on individual leadership is a presidential system.

Definition of a presidential system:
A presidential system is a form of government in which a head of government (the president) leads an executive branch that is separate from the legislative branch. In this system, the president is both the head of state and the head of government. The president is elected by the people and holds significant executive powers.

Characteristics of a presidential system:
1. Separation of powers: In a presidential system, the executive branch is separate from the legislative branch. This ensures a clear distinction between the roles and responsibilities of each branch of government.
2. Strong executive power: The president in a presidential system has significant executive powers and is directly elected by the people. They have the authority to make important decisions and implement policies.
3. Fixed term: The president serves for a fixed term and cannot be easily removed from office. This provides stability and continuity in government.
4. Checks and balances: While the president has significant powers, there are checks and balances in place to prevent the abuse of power. The legislative branch can challenge the president's decisions and propose legislation.
5. Limited role of the legislature: The legislative branch in a presidential system mainly focuses on making laws and has limited involvement in the executive functions.

Why the answer is 'B' (presidential):
Based on the characteristics of a presidential system, it aligns with the description provided in the question. The system based on individual leadership, with a clear separation of powers, a strong executive branch led by a directly elected president, and limited involvement of the legislature, is characteristic of a presidential system.

Therefore, the correct answer is option 'B' (presidential).