Which of the following describes aggregations? a)porous marine invertebrates who pull water through their soft bodies in order to obtain
oxygen and nutrition

b)random fish in the same location, such as fish feeding in the same area of a kelp forest or coral reef

c)highly organized groups of fish, which swim in the same direction, at the same speed, and generally spaced evenly apart

d)groups of fish formed when fish loosely adjust their swimming to be near other fish, usually of the same size and species