The primary difference between a high relief and a low relief is that

a type of sculpture which contains objects embedded in a ground surface. a form that extends at least halfway out of the background. a relief that has a lower projection from the background than high relief. ... a low relief is carved into the background, where as a high relief is projected out.

sure

explanation:

my @ is griezling and @ mgcisart ! : ) ifb

i would say the answer is b. zigzag lines of the leaves. i believe this is the answer because zigzag lines go in different direction while the other options like: the vertical lines of the trees, the dotted lines on the road, and the curved lines of the park benches go in one direction.