Final answer:
On a large screen, an activity that displays multiple fragments is using a multi-pane layout which is particularly useful in Android app development for devices with larger screens.
Step-by-step explanation:
On a large screen, an activity can display multiple fragments. This is known as a multi-pane layout. The concept of a multi-pane layout is common in Android app development, particularly for tablet devices or large screen phones. It allows an application to show more content and functionality side by side, similar to a master/detail flow where you might have a list of items on one side and the details on the selected item on the other side.