Please answer the following question: Fact 1: Bivalves feed on plankton and nonliving organic matter. Fact 2: Mussels are bivalve mollusks. Given the two facts above, answer the question "What feeds on plankton and nonliving organic matter?" with the following options: - barnacles - mollusks - animals - the Sun - sharks - graptolites - bacteria - dogs
A:
mollusks