Both the gandhara style and the mathura style were types of art associated with what region?

the answer of "what has three legs but never walks" is a yard stick. this answer can be found at

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.