Your question is Delegates, Events, and Runtime Basics. 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).
Explain the differences between delegates and events, app.run() vs. app.use(), and dynamic vs. var in your preferred language.
Use C# and ASP.NET Core for concreteness where applicable. Explain the runtime or language behavior, show a small representative example for each comparison, and state when you would choose one mechanism over the other.