these three picture are good example of all three different ads. we have the line art ad which is an artwork type ad that is comprised of a solid black, there are no shades of gray or shades of any other color. the black and white half tone ad (nike) the ad has a combination of dots and an optical illusion of shading. then we have the four color process print ad, where i think the ad is full of color as well as black and white tones.