Answer:
D. It has the fewest plants.
E. It has the highest density.
Explanation:
Since the water in the bottom of the sea has the highest density, and the lowest light, this layer is called the hadalpelagic zone, and it goes from 6,000 meters or 19,686 feet, up untill the lowest point known in the ocean that is located in the mariana trench, the temperature is found to be just above the freezing point and the pressure is eight tones per square inch, this makes it the most dense water in the ocean and it does not allow plants to grow properly, invertebrates thrive on those conditions.