Final answer:
Revenue is income earned by a company or organization. Taxes are the primary source of government revenue, influencing the economy in various ways.
Step-by-step explanation:
Revenue is defined as income, especially when of a company or organization and of a substantial nature. Revenue collection is crucial for the functioning of governments at all levels in the United States. Taxes are the primary source of government revenue, and they have a significant impact on various aspects of the economy. The individual income tax is the largest source of federal tax revenue, followed by the FICA tax used for Social Security and Medicare.