Which aspect is often monitored as part of economic indicators for a country?

Monitoring Gross National Product (GNP) is essential as it reflects the overall economic performance of a country. GNP measures the total economic output produced by the residents of a nation, including the goods and services generated both domestically and abroad. This indicator gives a clear picture of a country's economic activity and growth over time, making it a vital metric for assessing the health and size of its economy.

GNP is often used in conjunction with other economic indicators to provide a more comprehensive understanding of a country's economic situation. For example, rising GNP suggests that a country's economy is growing, which can lead to improvements in living standards and job creation. Conversely, a declining GNP may indicate economic troubles, which can result in unemployment and a decrease in the quality of life for its citizens. Thus, GNP serves as a crucial tool for policymakers and economists to gauge economic health and make informed decisions regarding fiscal and monetary policies.

While other choices such as infant mortality rates, tourism statistics, and public sentiment surveys provide valuable insights, they do not directly reflect economic output in the same quantitative manner as GNP does. These other indicators may relate to quality of life and public perception but are not central to measuring economic activity.