Frozen language occurs only in meetings conferences written material

Frozen language occurs only in written material. Thousands of years ago, writing was the only form of evidence during preaches, sermons and activities of humans. Scribes were the ones who writes these evidences and placed it in paper.

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.