In Jay's drawing (top) the bold, black verticals move in up and down across the page. He has pushed the materials around on the paper, adding and reducing, much as an expressive painter might do. The right side of the composition is particularly effective in bringing together elements in focus and out.
Lauren (bottom) has established a triangulation between the hole in the upper left (water can), down to the block and up to the hole (ceramic bowl) on the right. Again the right side of the composition is particularly well drawn in the area around the white bottle, block and ceramic bowl. The values are rich and contrasting and the line quality strengthens the contours and structure.