The main point of focus in a visual display is called figure which is the answer. In the geometry optics, the focus which is known as the image point is where the light rays come from a distance on the object being focalize.
The most dominant line usage are the vertical lines of the trees.
Simultaneous contrast refers to the way in which two different colors affect each other. The theory is that one color can change how we perceive the tone and hue of another when the two are placed side by side.
