Go to Wikimedia Commons now and search for apple. The page for apple contains various images; click on one that you like and the link will take you to an about page for the image. Right-click on the image and choose Copy image location from the context menu (Firefox browser). When you paste you will see a link, something like the following:
We can generate a link to a smaller image on Wikimedia by adding
/thumb in the middle and a suffix like
/NNNpx-NAME.EXTENSION, where px is the short form for the unit pixels. For example, to create an image that is 240 pixels wide (a reasonable size for an image to illustrate our quiz) enter the following ...