In political theory, the functions of the state are divided into compulsory (or essential) and optional (or welfare) functions. The defense of the state against external aggression, the maintenance of internal law and order, and the administration of justice are considered the most fundamental, compulsory duties that a state must perform to ensure its survival and sovereignty.

Constitutions are rarely purely written or purely unwritten. Most systems, even those with codified documents, rely on unwritten conventions and judicial interpretations to function effectively. A constitution that is described as having a mix of both is one where the formal document is supplemented by significant unwritten practices, traditions, and common law, which together form the complete constitutional framework of the state.

A suzerain state is a dominant power that controls the foreign policy and international relations of a vassal state, while allowing the vassal to maintain internal autonomy. This historical concept differs from colonialism, where the dominant power exercises direct administrative control. The suzerain-vassal relationship is a specific form of hierarchical international order.

Sikkim is not a sovereign state; it is a state within the Republic of India. Following its merger in 1975, it ceased to be an independent kingdom. Bhutan, Burma (Myanmar), and Bangladesh are recognized sovereign states with their own governments, territories, and international standing.

A State is defined by its occupation of a specific, defined territory. Sovereignty is exercised within these territorial boundaries, which distinguish one state from another. Unlike voluntary associations that may have global or dispersed memberships, the State is inherently linked to a fixed geographic area where its laws and authority are binding upon all residents.

The provided answer suggests that the right to property is not a cause for constitutional government. However, historically, the protection of property rights was a central driver for the development of constitutionalism, particularly in liberal traditions. This answer choice conflicts with standard political theory, which views property rights as a fundamental element that constitutional governments are designed to protect.

James Wilford Garner is the scholar most frequently cited for formalizing the definition of the State. He argued that the State is a community of persons, more or less numerous, permanently occupying a definite portion of territory, independent of external control, and possessing an organized government to which the great body of inhabitants render habitual obedience.

Max Weber provided this classic sociological definition of the state in his essay 'Politics as a Vocation'. He argued that the defining characteristic of a state is its unique claim to the legitimate use of violence to maintain order. This definition emphasizes the state's role as the ultimate authority in a territory, distinguishing it from other social organizations that lack such coercive power.

The matches are: Cicero (State without justice is robbery), Hegel (State is the march of God on Earth), Louis XIV (I am the state), and Marx (State is an executive committee for the bourgeoisie). These represent diverse historical perspectives on the nature, legitimacy, and function of the state.

While modern states typically provide education, it is categorized as an optional or 'facultative' function. Unlike essential duties such as national defense, law enforcement, and judicial administration, which are necessary for the state's existence, optional functions are performed to promote the general welfare and progress of society.