___ is a function that is used to define a layout in your app using Composable functions.ComponentActivity()onCreate()DefaultPreview()setContent()

The function that is used to define a layout in your app using Composable functions is setContent().

In Android development, particularly when using Jetpack Compose, the setContent() function is called within the onCreate() method of a ComponentActivity. This function allows you to define the UI of your application using a declarative approach with Composable functions. By using setContent(), you can specify which Composable functions to render in the UI, facilitating the building of dynamic and responsive interfaces.

Here's an overview of the relevant components:

1. ComponentActivity: A base class that is used for activities that want to use Jetpack Compose.

2. onCreate(): This method is overridden to set up the activity when it is created. Here, you typically call setContent().

3. setContent(): This function is critical for defining your app's layout using Composable functions.

4. DefaultPreview(): This is used to provide a preview of your Composable functions in the Android Studio editor.

In summary, setContent() is the specific function responsible for rendering layouts with Composable functions within an Android app.