Your question is What is an Activity in Android. 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).
Tell me about what an Activity is in Android and how it fits into an app's lifecycle. Explain the purpose of the main lifecycle callbacks, what happens when an Activity moves to the background or is recreated, and where screen state should be retained. Keep the answer focused on Android applications written in Kotlin, using the standard Activity lifecycle rather than Jetpack Compose-specific APIs.
