Which term defines an individual, partnership, or corporation that engages in economic activities?

The term that best encompasses an individual, partnership, or corporation engaged in economic activities is "Organization." This term is broad enough to include various forms of entities that operate within the economy, facilitating trade, production, and services. An organization can be a single individual (like a sole proprietorship), a group of individuals (like a partnership), or a more complex structure like a corporation.

While "Employee" refers specifically to individuals who work for another entity and "Employer" designates those who hire employees, these terms are limited to specific roles in the economic cycle. The term "Person" is also too vague, as it does not specifically indicate an entity engaged in economic activities. Therefore, "Organization" is the most appropriate choice, as it encapsulates all entities, whether they are profit-driven corporations or non-profit partnerships, involved in economic activities.