How is the seabed topography of the Indian Ocean formed?

There is a highland extending from the west coast of the Indian Peninsula to the south of the Australian mainland, from north to south to east, generally between 300 cm and 000 meters underwater. The south section is the southwest Indian Ocean Ridge, the middle section is the middle Indian Ocean Ridge, the north section is the Carsborg Ridge, and the part folded west is called Atlantic-Indian Ocean Ridge. The highlands in this area divide the Indian Ocean into two parts: in the east, there is a sea ridge of 90 east longitude, which runs through the north and south for 5,000 kilometers, from10 north latitude to 34 south latitude. It is the straightest and longest linear structure on the earth. The Central Indian Ocean Basin and the Wharton Basin are divided into two parts: the east and the west. The seawater is deep, some of them are deep trenches, and the Java Trench is the deepest. The seabed topography in the west is very complex, with staggered ridges separated by a series of basins = there is an Arabian basin between the Carlsberg Ridge and the Asian coast, and a Somali basin between the Carlsberg Ridge and the African coast; There are Madagascar basin, Natal basin and gareth basin in the west of the southwest Indian Ocean Ridge. On the east and west sides of the kerguelen Ridge in the South Indian Ocean are the South Indian Ocean Basin and the Atlantic-Indian Ocean Basin. These basins are all over 5000 meters deep. In the tropical coastal areas of the Indian Ocean, there are many coral reefs and coral islands. There are many continental ridges or plateaus in the Indian Ocean, which are widely distributed. Most of the causes are turbidity current or continental slope sliding collapse, which makes a lot of debris accumulate on the edge of deep-sea plain, or it was originally formed by differential settlement of some continents. On the coast of Africa, there are Agus Plateau and Mozambique Plateau, and in the south of Madagascar, there is Madagascar Plateau, all of which are about 2500 meters deep. In the Maslinhaitai in the northeast of Madagascar, the depth varies from 100 meters to several hundred meters, and some places are higher than the sea surface to form islands. Continent uplift adjacent to the Australian continent is caused by continental rifting or separation, such as Exmoen Plateau and Najera Leigh Plateau. Close to the Asian continent, there is Chagos-Lakdev Plateau facing south on the west side of Indian Peninsula.