Final answer:
A constitution is necessary to establish the principles, laws, and government structure of a country.
Step-by-step explanation:
A constitution is needed for a country to establish the fundamental principles and laws that govern the nation. It serves as a framework for the government, defines the rights and responsibilities of citizens, and sets limits on the powers of the government. For example, the United States Constitution outlines the structure of the government, guarantees individual rights such as freedom of speech and religion, and establishes a system of checks and balances to prevent any one branch of government from becoming too powerful.
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