Selection Tools

So the photoshop I will be using is Adobe Photoshop CS3. Here's a little introduction of what is in photoshop.

What are Selection Tools?

The selection tools allow you to select a portion or a subset of an image to work on. Most of Photoshop’s other tools and filters can then be applied to this selected area, altering its color, shape, texture, position and/or other attributes, while leaving the rest of the image untouched.

Photoshop contains three types of selection tools: the Marquee Tools, the Lasso Tools, and the Magic Wand.
The marquee tools are used to select a specific regularly shaped area. The marquee tools include the Rectangular, Elliptical, Single Row and Single Column Marquees:
The lasso tools are used to select an irregular area. These tools include the Lasso Tool, the Polygonal Lasso Tool and the Magnetic Lasso Tool.

The Magic Wand is used to select areas of an image based upon color. Another additional tool is the Quick Selection Tool.