Absence of Focal Point
There is no focal point in this image that I found online. It's all the same.
Emphasis by Contrast
This image I found online and the focal point is the butterfly as it completely stands out from the background.
Emphasis by Isolation
This image I found online and the focal point is definitely the red pen/marker as it sits up away from the rest of them. You are completely drawn to that one item.
One Element
This image was found online as well and the tree being colored and the rest being black and white makes it an great example of "One Element"
Emphasis by Placement
This is a great example that I found online of emphasis by placement as you are drawn right to that drooping flower out of the vase. If this drooping flower was right in the front/middle of the vase of flowers it wouldn't be nearly as emphasized and wouldn't be a focus at all.