Definition - Shape

Shape: 

The external form, contours, or outline of someone or something.

My own definition:

The physical form of an object or someone. 

This picture shows the element of shape because the silhouette of the frog sharp and clear. The green background from the leaf contrasts with the black shape of the frog, showing it off even more. Using a silhouette is the best way to show shape as this outlines the form of the frog.

Another silhouette is used in his picture to show shape. The lighting of the sun enables us to see the the outline of the person on his bike clearly as the outline is quite sharp, making the details easier for the viewer to see. 

Unlike other pictures showing shape, this one has a dark background and the object is a bright colour,   not showing a silhouette. This still works because the clear contrast lets the viewer see the outline of the smoke clearly, making the shape easy to notice.

The element of shape is highlighted in this picture as the colour of the object contrasts with the background of the picture. The outline os the leaf stands out from the background so the shape can be seen clearly.