Which of these was an experimental type of Romanesque architecture? a. ribbed domes b. ribbed arches c. ribbed vaults d. all of the above

It's C. ribbed vaults

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.

soft,hard and rough for soft would be a pillow or a stuffed animal hard wood floor or a table rough paint