The stress produced by the daily need to confront the tragedies of urban life, such as the need to deal with derelicts, criminals, and the mentally disturbed, and the need to engage in dangerous activity to protect a public that appears to be unappreciative of the police is classified as

Operational Stress

Explanation:

Operational stress is the stress experienced by a person who is constantly facing traumatic experiences. It is generally experienced by people who are working in fields related to keeping law and order in a country.

This stress is amplified when the people they are protecting are unappreciated by their efforts.

Hence, the type of stress described in the question is operational stress.

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