Which tool allows you to select a rectangular or square region in an image?

The Rectangle Marquee Tool is specifically designed to allow users to select rectangular or square regions in an image. This tool lets you click and drag across the image, starting from one corner of the desired selection area to create a rectangular shape. The selection can be adjusted in real-time as you drag the mouse, and once the area is selected, you can manipulate it, such as moving, copying, or applying effects to just that portion of the image.

The other tools mentioned serve different purposes and are not focused solely on rectangular selections. The Lasso Tool, for instance, provides a freehand selection capability, allowing more intricate shapes but not limited to rectangles. The Magic Wand Tool is used for selecting areas based on color similarity, which does not restrict itself to geometric shapes. Meanwhile, the Quick Selection Tool allows users to paint a selection using a brush-like interface, selecting based on texture and color rather than strictly rectangular areas. Thus, the Rectangle Marquee Tool stands out as the most appropriate choice for selecting rectangular or square regions specifically.