दिवसातून दोनदा समुद्राच्या पाण्याची लयबद्ध वाढ आणि घट होण्याला काय म्हणतात?

Which organization defines global ocean boundaries and historically standardized limits where the coast of Antarctica meets the surrounding waters?

Consider the following statements regarding aquatic/oceanic zones: A. The abyssal zone receives less than 1% of sunlight. B. The hadal zone lies between 200–2000 meters deep. C. The profundal zone is a freshwater equivalent of the aphotic zone. D. The photic zone extends up to ~200 meters depth. Which of the above statements are correct?