What is defined as the work that a person does for pay?

The definition of the work that a person does for pay aligns perfectly with the concept of a job. A job is typically understood as a specific position of employment where an individual performs tasks and responsibilities in exchange for monetary compensation. It can be temporary or permanent and does not necessarily imply a long-term commitment or a specific career path.

In contrast, a career is a broader term that encompasses the overall progression and development in one's professional life, often including various jobs and experiences. Volunteering refers to offering services for free, which does not involve pay, while an internship is usually a temporary position that may involve work for pay or simply experience, often aimed at gaining practical skills in a specific field.