What are some challenges you think the next generation will face?

electricity, pollution (alot of waste products), and nature (well prob lose it with all the factories and buildings, animals going extinct...etc

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.