Final answer:
The Back button is found in the Navigation bar on an emulated phone, separate from the Action bar, Status bar, and general Toolbar.
Step-by-step explanation:
The Back button is typically found in the Navigation bar of an emulated phone. The Navigation bar is the part of the phone's interface where you can find navigation buttons like Back, Home, and Recent Apps. This is distinct from the Action bar, which is usually at the top of an app's interface and can contain app controls and menus; the Status bar, which displays information like the time, battery level, and notifications; and a Toolbar, which is a general UI element that can contain various controls, based on app design.