The correct answer is D. Disability, making a worker unfit for work.
Disability is not an avoidable cause of labour turnover because it is not something that can be controlled by the employer. If a worker becomes disabled, they may no longer be able to perform their job duties and may need to leave their employment.
The other options are all avoidable causes of labour turnover. Dissatisfaction with job can be addressed by providing employees with more challenging work, more opportunities for advancement, or better working conditions. Lack of training facilities can be addressed by providing employees with the training they need to do their jobs effectively. Low wages and allowances can be addressed by providing employees with higher wages and better benefits.
It is important to note that labour turnover can have a significant impact on an organization. When employees leave their jobs, it can lead to increased costs for recruitment and training, decreased productivity, and a loss of institutional knowledge. Therefore, it is important for organizations to take steps to reduce labour turnover.