Final answer:
The term that applies to the situation in which employees are terminated or empty positions are left unfilled once someone leaves an organization is turnover.
Step-by-step explanation:
The term that applies to the situation in which employees are terminated or empty positions are left unfilled once someone leaves an organization is turnover. Turnover refers to the rate at which employees leave a company and are replaced by new hires. It can happen voluntarily (resignation, retirement) or involuntarily (termination, layoffs). For example, when an employee decides to leave a job for better opportunities, their departure creates a vacancy that needs to be filled by a new hire.