Angles can form sharp, potentially penetrating points. Line can spot, speckle, decorate in countless ways to suggest texture. To characterize people, objects, actions, and places. Look at the whole page. Are they the same size on all the pictures or do they get bigger or smaller.
Borders can suggest confinement or safety.
D. Look at the color used. E. Look at the line used. F. Look at the shape used. G. Look at the texture used.