Spot
This photo is an example of position. The two flowers draw your eye because of their position in comparison to the others.
This photo is an example of shape. The rectangular shaped earring is identified as the focal point of this photo as your eye is drawn to it since it is a different shape than the other two earrings.
This photo is an example of using size to create a focal point. The seashells are all small in size except the one large one, which automatically draws your eye since it stands out so much from the other shells.
This photo is an example of using color to establish a focal point of a photo. The red flower immediately draws your eye since the color contrasts the multiple yellow and purple flowers surrounding it.