Historically, the main purose of statues has been to

Commemorate rulers and other important individuals.

Explanation:

Statues are a sign of power, and significance. They are sculpted and can represent a person, animal, or thing.

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.

i think it's about 10 mins.

actually i think that's wrong, but i don't know how to delete this.

but who knows it might be right.