工作 (Labor) refers to the physical or mental effort used to produce goods and services. It is a fundamental aspect of the economy, as it contributes to the creation of wealth and the functioning of society. Different types of labor include manual labor, skilled labor, and professional labor, each requiring varying levels of training and expertise. In many societies, labor is organized into various sectors, such as agriculture, manufacturing, and services. Workers are often compensated for their efforts through wages or salaries. Labor laws exist to protect workers' rights and ensure fair treatment in the workplace, promoting a balanced relationship between employers and employees.