Final answer:
Governments are classified based on the power and authority given to the central and regional governments, the country's GDP, and legislative structures.
Step-by-step explanation:
Governments are classified in different ways based on various criteria. One way governments can be classified is by the amount of power and authority given to the central (national) government and regional governments (states/provinces). This classification includes unitary governments, federations, and confederations.
Another way governments can be classified is based on a country's gross domestic product (GDP), which is a measure of a country's national wealth. GDP can be calculated by totaling the income of all citizens or the value of all goods and services produced in the country during a year.
Lastly, governments can also be classified based on their legislative structures, such as the number of legislators. However, this is just one aspect of government classification and not the sole determiner.