Answer:
Ageism.
Explanation:
Ageism is a type of stereotype, discrimination, and prejudice based on a person's age. This stereotype has an ill-effect on older people that affects their health. They are faced with discrimination on mostly all levels of life. They are overlooked for employment, they are oftentimes marginalized in the society, etc.
These behaviors by the society around them affect their health and make them prone to illnesses.
In the given question, the reluctant hiring of older workers (50-60 years of age) is an example of ageism.
So, the correct answer is ageism.