Part One: Based on the description provided, the country is using a unitary system of government.
Part Two: The clues in the description that support this answer are:
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Strong Central Government: The mention of a strong central government indicates that power is concentrated at the national level rather than being distributed among various levels of government (like in a federal system).
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Legislative Branch Requires Presidential Approval: The fact that the legislative branch can make laws only with the president’s approval suggests a centralized authority where the national government has significant control over law-making, indicative of a unitary system as opposed to a federal one where states have independent law-making powers.
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States Rely on Central Government for Money and Support: The reliance of the 45 states on the central government for financial resources and support further implies that the state governments do not have substantial independent revenue-generating capabilities, which is characteristic of a unitary system where local governments derive their power and funding from the central authority.