What do the indicators used by economists reveal?

changes in production and demand

changes in employment levels

changes in prices

changes in the health of an economy

The correct answer would be option D, Changes in the health of an economy.

Explanation:

Economists are the experts who analyze the indicators that are used to determine the health of an economy. Health of the economy can be analyzed by various indicators. All the other given options are somehow the indicators which reflect a country's economic condition. For example changes in the production and demand, employment levels and the prices of products or services indicate the health of the economy. So the purpose of an economist is to analyze the overall health of the economy by studying all the indicators of that economy. Other important indicators may include, Inflation, Gross Domestic Product, Gross National Product, exports, imports, non farm payrolls, unemployment rate, unemployment claims, etc.

changes in the health of an economy