Brackish water has a lower salt content than seawater, making option I the correct match for statement 4.Intertidal zones are areas that are alternately submerged and exposed by tides, creating a unique ecosystem where various organisms live together, making option D the correct match for statement 5.Nursery grounds are habitats that provide protection and food for young organisms, making option J the correct match for statement 6Invertebrates are animals without backbones, making option G the correct match for statement 7.Sea meadows are large areas of seagrass, making option A the correct match for statement 8Ocean floor is the bottom of the sea or ocean, making option H the correct match for statement 9.Crustaceans are animals with hard shells and multiple legs, making option C the correct match for statement 10.