Vertical lines show more of a potential for movement.
While diagonal lines strongly show movement and give more of a feeling of action to a picture.
The line is apart of every shape, it is basic, but important.
"Elements Of Design: The Line » SitePoint." SitePoint » Web Design, Web Development, Freelancing, Tech News and more. N.p., n.d. Web. 1 Dec. 2011. <http://www.sitepoint.com/elements-of- design-the-line/>. "Elements of Design: Line." University of Saskatchewan. N.p., n.d. Web. 1 Dec. 2011. <http://www.usask.ca/education/cours