Final answer:
Government spending is the correct answer as it represents an injection into the economy in the circular flow of macroeconomics. It is an inflow because it involves spending of funds that can stimulate economic activity, whereas the other options such as taxes, savings, and imports do not act as injections in this context.
Step-by-step explanation:
The main answer to which of the following is an injection (INFLOWS) in the economy, as shown in the circular flow of macroeconomics, is government spending. Inflows are financial inputs that help to boost the economy by injecting additional funds. Government spending represents an inflow because it injects money into the economy through purchases of goods and services, funding for public projects, and other governmental expenditures. Conversely, taxes, while necessary for government revenue, are not considered inflows but rather outflows because they represent money being taken out of the economy. Savings and imports also do not qualify as injections in this context; savings refer to money that is stored away and not immediately spent, while imports represent money flowing out of the domestic economy to other countries.Taking information from the provided reference material, we understand that government spending (G) that exceeds the taxes collected (T) is a form of government borrowing and can be an injection into the economy when it is used to finance public expenditure. The explanation here uses more than 100 words to describe the concept of inflows in terms of government spending, taxes, savings, and imports, providing a comprehensive understanding of why government spending is considered an injection.In conclusion, government spending is the correct answer among the options given as it represents an injection into the economy within the circular flow of macroeconomics.