State four causes of termination of employment.

1. Resignation: An employee may choose to terminate their employment by resigning from their position for personal reasons, career advancement, or to pursue other opportunities.

2. Termination for cause: An employer may terminate an employee for cause, such as misconduct, violation of company policies, poor performance, or unethical behavior.

3. Layoff or downsizing: Employers may terminate employees due to financial constraints, restructuring, or downsizing of the company, resulting in the elimination of certain positions.

4. End of contract: Employment contracts may have a specified end date or termination clause, leading to the automatic termination of employment once the contract expires or certain conditions are met.

1. Voluntary resignation
2. Termination by the employer (also known as "firing" or "layoff")
3. Retirement
4. Death