The call to action and the hook for this PSA is "To many people eat on the streets." What is really interesting about this PSA is that the storm drain is acting as a dishwasher for the plates. The target audience of this PSA could range from adolescent children to the elderly. I feel that the whole point of this PSA is to bring awareness to Poverty.
I think this is a creative way to catch the attention of an audience. This is a funny yet truthful message which supports the ad. Because of this catchy image, there's no need for much of a description or caption.