Which of the following is a risk factor that could lead to suicidal behavior?

Mental illness is a well-established risk factor for suicidal behavior. Conditions such as depression, bipolar disorder, schizophrenia, and anxiety disorders can significantly influence an individual's thoughts and feelings, potentially leading them to consider suicide as an option for escape from their pain or distress. Mental illness can impair judgment, lead to feelings of hopelessness, and create intense emotional turmoil, all of which heighten the risk of suicidal behavior.

In contrast, while a history of violent behavior, physical injuries, and sudden wealth might be associated with various stressors or changes in an individual's life, they do not have the same direct and profound impact on mental health as mental illness does. Understanding the connection between mental health and suicidal tendencies is crucial for effective prevention and intervention strategies.