barnacles, rockweeds, smooth periwinkles ------> A) splash zone
green sea urchins, sponges, brittle starfish -------> B) middle shore
rough periwinkle, algae -------> C) lower shore
patches of lichens -------> D) upper shore
green sea urchins, sponges, brittle starfish -------> B) middle shore
rough periwinkle, algae -------> C) lower shore
patches of lichens -------> D) upper shore