Option 1 -> Aggregate supply refers to the total production of goods and services in an economy, not demand components.
Option 2 -> Aggregate demand (AD) is calculated as AD = C + I + G + (X-M), where C is consumption, I is investment, and G is government spending.
Option 3 -> Final goods are products ready for end-use consumption, not an economic aggregate with these components.
Option 4 -> Multiplier is a coefficient showing the effect of spending changes on total output, not a sum of these components.
Hence, Option 2: Aggregate demand -> Aggregate demand represents the total demand for all goods and services in an economy at a given price level and time period. Its main components are Consumption (C), Investment (I), Government Spending (G), and Net Exports (X-M). These three components mentioned in the question—consumption, investment, and government spending—form the core of aggregate demand in a closed economy model. -> correct