Oil is taken from the ocean floor by oil rigs, attached to a large drill, which sucks the oil up.
Because under the water, there is still solid rock, for 60 km, some of this rock contains oil, that's why offshore oil exploitation exists.
Because we need oil. So they created oil fields for easier oil production. The Ocean floor is the way you get oil, so the oil fields are attached to the Ocean floor.
You need to have the hole tapped out to a larger size, and put in a larger drain plug. Or, you can have the whole oil pan replaced, which is more expensive
Oil gets into the ocean when there's a hole in the oil transportation(i.e holes in ships, or anything that transports oil).
if the oil is at the spark plug base the valve cover gasket is leaking. if the spark plug electrode is covered with oil the engine needs rings
You normally find oil in the ground or under the ocean floor.
oil and natural gas
Oil drilling often occurs on the seabed, that is, the very bottom of the ocean.
Its not (unless you mean skimmed from the surface). The oil they extract is from deep below the bottom (the floor) of the ocean.
Because oil cost a lot of money.