"Economic activity" refers to the actions that involve the production, distribution, and consumption of goods and services at all levels within an economy. These activities encompass a wide range of processes and interactions, including:

1. Production: The creation of goods and services. This can involve manufacturing, agriculture, mining, and any other activity that generates products or services.
2. Distribution: The process of getting goods and services from producers to consumers. This includes logistics, transportation, and the wholesale and retail sectors.
3. Consumption: The use of goods and services by individuals and businesses. This can be for personal use, business operations, or public services.
4. Investment: The allocation of resources, such as capital and labor, towards the creation of new goods and services, infrastructure, and other productive assets.
5. Trade: The exchange of goods and services between individuals, businesses, and nations, both domestically and internationally.

Economic activity is measured by various indicators, including Gross Domestic Product (GDP), employment rates, and trade balances, among others. These activities collectively drive the economy by generating income, creating jobs, and facilitating the flow of money and resources within and between economies.