How do political systems rise, develop and decline ?

I'll answer this as best as I could. I really hope this helps.

Explanation:

Political systems are formed when a group of people in a civilization begins to form social classes, with the elite at the top and making decisions and laws. They continue to rise when the political system of one civilization begins to branch out to other civilizations, but they also decline when that political system is overthrown by another, or if they experience a mass decline in public opinion.

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.