Which of the following is not an example of potential energy? chemical energy, gravitational energy, mechanical energy, nuclear energy

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.