purchasing power parity is used to compare the gross domestic product between\no businesses.\no…

Brief Explanations:

Purchasing power parity (PPP) is an economic concept. It is mainly used to compare the economic output (gross domestic product) of different countries by adjusting for differences in price levels. When comparing GDP between countries, using PPP helps to account for what a country's currency can actually buy in terms of goods and services. It is not used for comparing between businesses (as it is a macro - economic, cross - country concept), not for comparing consumers directly (its scope is broader than individual consumer comparison), and not for stock markets (stock markets have their own valuation and comparison metrics like price - to - earnings ratios etc.).

Answer:

countries' currencies.