I haven't looked at this photograph in a long time. Somehow it is even more intriguing than the last time I saw it.
This is a good example of depth of field. The foreground is in focus and the background in blurry. You can create this effect by opening up the aperture. It is also called the f-stop. It is the ring on the lens that has numbers sometimes from 1.4 to 22 or more. The lower the number, the objects further away from what you focus on will be blurry. The above photograph was shot with a f/9 which is fairly high, however in this case the foreground is very sharp and the objects in the background that are very blurred were very far back.
Tomorrow I will post of photograph with a higher f-stop to show the difference.