Final answer:
Frictional unemployment is the term that describes the situation in which employees are terminated or empty positions are left unfilled once someone leaves an organization.
Step-by-step explanation:
The term that describes the situation in which employees are terminated or empty positions are left unfilled once someone leaves an organization is called frictional unemployment. This type of unemployment occurs when there is a temporary mismatch between the skills and qualifications of job seekers and the requirements of available job openings. It is a normal part of the labor market as individuals search for better job opportunities that align with their skills and interests.