Crabs and prawns are examples of crustaceans, which are animals with hard shells and multiple legs, making option C the correct match for statement 1.Marine ecosystems are complex systems that include various organisms and their environment. While seagrass is a part of some ecosystems, it's not the defining feature of all marine ecosystems. Option A is a more specific description of a seagrass meadow.Fisheries are areas where fish and other marine resources are harvested. They are located in coastal areas where the ocean meets the land, making option B the correct match for statement 3.