Which term is defined simply as work?

The term that is defined simply as work is "labour." In economic and geographical contexts, labour refers to the physical and mental efforts used to produce goods and services. It encompasses all forms of work activity, including both skilled and unskilled tasks performed by individuals. Labour is a fundamental factor of production and plays a critical role in economic theory and practice.

The other terms have specific connotations that differentiate them from the broader notion of work. Employment refers specifically to the state of being hired and working for pay, which does not encompass unpaid work or informal labour. A task is usually a specific piece of work or duty that may be assigned to someone, but it does not encompass the wider idea of all work activities. Occupation refers to a person's regular work or profession and is more closely linked to career paths rather than the act of working itself. Thus, "labour" is the most appropriate term that simply equates to work.