Final answer:
Hamilton's Federalist No. 70 supports a single executive with powers checked by separation of powers among the branches of government, to prevent potential discord and inefficiency from a plurality of executives.
Step-by-step explanation:
Alexander Hamilton, in Federalist No. 70, expressed concern over a plurality in the executive as potentially leading to discord and weakened governmental operations. He favored a single chief executive with powers checked by the system of separation of powers and a system of checks and balances. In considering the constitutional provisions that replace the division of executive power, to check the power of a single chief executive, the option that best reflects this principle is separation of powers among the legislative, executive, and judicial branches. This system is designed to ensure that no single branch gains too much power, with each branch having distinct responsibilities and the ability to limit the powers of the others, as envisioned by both Hamilton and Madison in their respective Federalist writings.