Answer:

1. the Document window, the Toolbar, the Options Bar, Menu Bar, and Panels.

2.Zoom tool, Hand tool, Quick Selection tool, Eye tool, Whiten Teeth tool, Straighten tool,Type tool,Spot Healing Brush tool,Crop tool, Move tool

3. Palette options: Each floating palette offers its own collection of options. These options may include icons, pop-up menus, slider bars, you name it.

Palette menu: Click the right-pointing arrowhead to display a menu of commands specific to the palette. These commands enable you to manipulate the palette options and adjust preference settings.

Palette tabs: Click a palette tab to move it to the front of the palette group. (You can also select the palette commands from the Window menu, but it’s more convenient to click a tab.)

Collapse button: Click the collapse button to decrease the amount of space consumed by the palette. If you previously enlarged the palette by dragging the size box, your first click reduces the palette back to its default size. After that, clicking the collapse button hides all but the most essential palette options.

hope this can help