Today's element of composition is
using horizontals, verticals or diagonals to emphasize your subject
Well, I don't have a perfect example to share with you today, but this photo will work with a bit of explaining.
I was photographing this bridge. (Yes, that is a bridge, and I walked over it!) See those lovely lines that the boards make? If I had moved my camera up a bit and focused on the PEOPLE instead of the BRIDGE, the lines would have emphasized the people beautifully. The photo is still nice, the composition isn't quite right to call it a lines example.
Only 2 days of this series left...hang in there! Tomorrow is Use of White Space :)