If nation state is invaded by another nation ,what purpose has its government failed to perform

Protection

Explanation:

A nation state can be described as a state in which majority of the people living share common cultures and beliefs. It is the work of the government to protect the rights of the majority as well as the minority cultures of the nation state. If a government fails to do so or if a nation state is invaded by another nation, then it is the government which is to be held accountable for failing to provide protection to the nation state.

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.