The bottom number in this time signature means: O A. dotted half note
O B. quarter note
O c. half note
O D. fourth note

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.