Answer: Investment and Increases.
Explanation: Economic expansion basically depends on four factors: consumption, investment, public spending and trade balance.
GDP (Gross Domestic Product) is nothing more than the aggregate of all final goods and services produced in a country over a period of time.
The first factor that directly influences the GDP variation concerns private consumption, that is, household expenditures for the purchase of goods or services.
Another factor that has a strong influence on GDP variation is private investments, those made by companies.