Answer:
D. Layers of government
Explanation:
The federal government represents a layer of a country's government. In this layer are the president of the republic, the senators and the governors.
Federal laws are created in this layer of government and take precedence - that is, priority - over state and municipal laws, covering important aspects of the country's routine. In this sense, the freedom of legislation of states and municipalities is relatively narrow.
The most important responsibilities of the federal government are: international relations, international trade, major infrastructure projects - such as highways, railways, hydroelectric plants -, higher and technical education, national defense, federal police, regulatory agencies, economic matters such as fiscal policy, exchange rate policy and monetary policy.
