The total amount of goods and services in the economy available at all possible price levels is referred to as "aggregate supply."
Explanation:
1. Aggregate Supply: Represents the total supply of goods and services that firms in an economy plan to sell during a specific time period at different price levels. It includes all individual supply curves of various goods and services combined.
2. Gross National Product (GNP): Measures the total economic output of the residents of a country, whether the production occurs within the country or abroad. This metric includes GDP but also adds income from abroad minus income sent abroad.
3. Aggregate Demand: Represents the total quantity of goods and services demanded across all levels of the economy at different price levels. It combines consumption, investment, government spending, and net exports.
4. Gross Domestic Product (GDP): Represents the total economic output within a country's borders, regardless of who produces it. It is the sum of all final goods and services produced within a country during a specific time period.
Thus, the correct answer is:
aggregate supply
