Your question is Defining IT Security. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What does IT security mean to you, and how do you apply it in your everyday work?
Answer this as a practical security-engineering question. Explain how you identify threats, protect systems and data, use specific controls, verify those controls, and respond when they fail. Use examples from normal engineering activities such as code changes, identity management, infrastructure operations, vulnerability remediation, monitoring, or incident response.