The majority of marine organisms are found in a hydrothermal vents. b deep ocean waters. C shallow, coastal waters. d square square

The majority of marine organisms are found in shallow, coastal waters. This is because shallow, coastal waters provide a variety of habitats and resources that support a wide range of marine life. These areas receive ample sunlight, which supports photosynthesis and the growth of phytoplankton, the base of many marine food webs. Additionally, coastal waters are often nutrient-rich due to runoff from land and upwelling currents, which further supports the growth of marine organisms.