Concept:An oil spill is the accidental release of liquid petroleum hydrocarbon into the environment.Explanation:Liquid petroleum products such as crude oil can escape during extraction, transportation, or storage.This release often reaches marine areas like oceans and coastal waters, but it can also occur on land.Such an event is known as an oil spill.It is caused by human activity and is considered a form of pollution.The other options do not describe the physical release of petroleum into the environment.Answer:B. Oil spill