On a hike in the mountains, you find a stream with a rocky bottom. Many of the rocks are covered in algae. Which type of mollusc is most likely to be found living in this environment?
A)A cephalopod because it can move quickly through the stream to avoid predators. B)A gastropod because it can use its radula to scrape the rocks for algae on which to feed. C)A bivalve because its sedentary life style allows it to remain still when currents flow over the rocks.