Answer:
Constitution
Step-by-step explanation:
The fundamental law undergirding the structure of government is referred to as CONSTITUTION.
A constitution can be defined as a written documents which states the laws and principles guiding the operational activities of a country or an organization.
A constitution consists of the basic rules and procedures for how the people of a nation shall be governed, it also states structures and powers of government, the rights and obligations of citizens are stated there, including the powers and structures of the govt, it also consist of the punishment melted on anyone who goes against the rules of the land.