Modern operating systems refer to files, shortcuts and folders as objects. In Microsoft operating systems, objects can be selected by a click on that object. A control click (the control key depressed while clicking) can add or subtract from the objects already selected.
To select all the objects, use control A ( the control key depressed while clicking A).
To further help selection, you can use the shift key. Click an object and then somewhere below or above, click a different object with the shift key depressed. Notice that all the intervening objects become selected (or deselected if they had already been selected)
You can further select objects visually using the lasso technique. Assuming that you are on large icon view, move your mouse somewhere and then with left button depressed, create a rectangle. Objects within this rectangle will be selected
Try this assignment using point and click. Move your cursor over the files and double click to get the operating system to load your the application associated with the file and then the file into the application