How does the artist create a cold feeling in the painting above?

Maybe because of all the grey colors, and the mountains look like they have snow on them?

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.