P-Waves travel through any kind of material whether it’s a solid, liquid or a gas
S-Waves can only move through solids and are stopped by liquids and gases
Hope this helps :)
Your answer is correct according to the 2016 list of countries with most oil production:
1. Russia (10,250,000 barrels per day)
2. Saudi Arabia (10,050,000 barrels per day)
3. United States (8,744,000 barrels per day)
4. Iraq (4,836,000 barrels per day)
5. China (3,938,000 barrels per day)
It has been observed that the mid ocean ridge is formed by tectonic plates. It is a seafloor made up of basalt that is formed by two processes such as ridge pushing and slab pulling. It is submerged inside the ocean and is less than 200 millions years old.