Oil is pumped out of the ground
It is called Crude Oil
Oil is pumped from deep under the ground. It is a fossil fuel, made millions of years ago.
Oil being pumped out of the ground can not be replaced in our lifetimes.
No, nothing is put in the ground to replace crude oil.
It has to be pumped. A drill is used to drill down to the oil and then a pump is setup to get the oil out.
Oil is not harvested, crops are harvested. Oil is explored and is normally pumped out of the ground.