Q. Consider the following observations:

1. Abyssal plains are more extensive in Atlantic and Indian Oceans as compared to the Pacific Ocean
2. Oceanic trenches are more extensive in the Pacific Ocean compared to the Atlantic and Indian Oceans
3. Seamounts are more common in the Pacific Ocean than in the Atlantic and Indian Oceans

Which of the above statements is / are correct?
Answer: 1, 2 and 3
Notes: All three statements are correct. Abyssal plains are most extensive in the Atlantic and Indian Oceans, while trenches are predominant in the Pacific Ocean. The Pacific also contains about half the world's seamounts, making them more common there than in other oceans. These features make the Pacific geologically more active and topographically variable.