What economic concept uses prices in any form of money for valuating and distributing goods and services?

The correct answer is the price system, which refers to the methodology through which prices establish the value of goods and services in an economy. This concept is fundamental to a market economy, where the interactions of supply and demand determine prices. Prices serve multiple functions: they provide crucial information to both consumers and producers, guiding decisions on what to purchase, what to sell, and how much to produce. The price system effectively coordinates the distribution of resources by signaling where they are most needed, allowing for efficient allocation of goods and services across the marketplace.

In contrast, the other options pertain to different economic concepts. An investment strategy focuses on how individuals or institutions allocate their financial resources to achieve specific financial goals, which isn't about the broader valuation and distribution of goods and services. The capital market refers to the financial market where long-term debt or equity-backed securities are bought and sold, and while it plays a role in funding businesses, it does not encompass the overall pricing mechanism of goods and services. Fiscal policy, on the other hand, involves government spending and taxation decisions to influence the economy, but again, it does not deal directly with the pricing of goods and services.