The main government of a nation is often called the federal or central government. These structures are designed to make clear the laws of the land.
I am assuming by level, you mean level of government. There is no distinction between government on a national level and government on a federal level. The federal level of government is the highest tier of government because its central to the nation. It represents a union of states. Those union of states form a nation. So you see how the two terms are interchangable, and can be used synonymously. The federal government is government on a NATIONAL level.
No
National government deals with the entire nation; for example, what is the legal voting or drinking age. State government does the same thing, but on the state level; for example, at what age can a teenager receive a driver's permit. State laws cannot contradict national laws; for example, the state could not say that the legal drinking age was 15, because the national law has set it at 21.
"National level" typically refers to activities, events, or organizations that operate at the level of an entire country. It denotes a scope that encompasses all regions or provinces within a nation.
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A national form of government is a system of governance that applies to an entire country or nation. Examples include federalism, where power is divided between a central government and regional governments, or unitary systems where power is concentrated at the national level.
A State Governor derives her power under the Executive Branch of government.
LOCAL LEVEL-Village,town or localitySTATE LEVEL-Entire stateNATIONAL LEVEL-Entire countryAt least that applies in a federal state such as the US. In other countries it depends on their structure, but you can always find some division between local and national government.
It depends on who the problem is affecting. If it is affecting only a small area of people in a single state, it is the responsibility of the state governments. They may chose to defer this right to a local government or a private organization, if they so chose. This is called devolution. If it is affecting the entire nation, it is the responsibility of the federal government. This is the textbook answer. Lately, with the way the courts, specifically the Supreme Court, have been ruling, practically everything is the federal government's responsibility.
at which level ? nation: congress state: state legislature city_town: city council
Because the national government can't control everyone in the nation, they need subdivisions (City and state) governments to ensure that all laws are followed. Another reason is because the governmental organizations that exist and function well at the national level don't necessarily function well at the state or city level.
That depends on which nation you are talking about. Each country has a different level of involvement of its national gvernment in areas like construction.