Answer:
The best definition or, at least, the definition that better expresses what I understand what a government is, is the first option. It says that government is the institution created by a society to create and enforce public policies.
Step-by-step explanation:
The Government is the main pillar of the State; the authority that directs, controls and administers its institutions, which consists in the general political conduction of the society and the exercise of the executive power of the State.