Concept:The circular flow of income shows money moving between households and firms.
Some activities add money into the system, while others remove money from it.
Explanation:Funds are added to the circular flow through injections.
Injections increase planned aggregate demand and raise the flow of income.
Common examples are investment, government spending, and exports.
On the other hand, leakages, also called withdrawals, remove funds from the circular flow.
Leakages include savings, taxes, and imports.
Since the question asks what adds funds to the circular flow, the correct term is injection.
Answer:D. Injection.
