Polar bears

About a year or so ago some public service announcement appeared on TV where there was no sound but just a picture with the caption, enjoy the Zen. There were four of these but after a couple of weeks one disappeared. The four were a picture of a large flower, a picture of some long green reeds, a picture of some dolphins and a mama polar bear with two cubs sitting on her back hugging each other. The best of the four was the bears but that was the one that was discontinued. Was that because the bears looked too comfy when they are supposed to be suffering? What other reasons?