I think, it should be movement.
Diagonal and curvy lines, illusion of space, repetition, energy - all of these create movement.
I believe looks like strings.
Answer:
If your in the inside trying to take a picture at an upward angle, you risk dropping the camera from where you stand but if your on the top of a building, and place your camera on the ground, you risk having it fall over, or getting damaged by debris from the pollution.
Explanation: