Final answer:
A tax on income is the most common tax found in contemporary industrialized societies. Income taxes are typically collected by governments at various levels and are based on the amount of money an individual or household earns from employment, investments, and other sources of income.
Step-by-step explanation:
A tax on income is the most common tax found in contemporary industrialized societies. Income taxes are typically collected by governments at various levels and are based on the amount of money an individual or household earns from employment, investments, and other sources of income. The tax rate is usually determined by a progressive system, which means that individuals with higher incomes pay a higher percentage of their income in taxes compared to those with lower incomes.