| A |
B |
C |
| (1) Continental shelf |
(1) Archipelagos formed by coral atolls |
(1) Very wide on the western side of India |
| (2) Mid-Oceanic Ridges |
(2) Portion of continent submerged underwater |
(2) Ashmore |
| (3) Oceanic Plateaus |
(3) Submerged mountain ranges that separate deep portions of the ocean floor |
(3) the Ninety East Ridge |
| (4) Islands |
(4) Deep flat areas on the ocean bottom |
(4) Chagos |
