Answer:
H
Explanation:
Volcanoes leak Oil inside of the Lava and give off flaming hot gas into the air (smoke)
Decayed plants give off gas after they are dead and rotting away into the ground/soil
Decomposed animals - They are giving off oil and sometimes poisonous gas (depends on the animal)
The sedimentary rock, it doesn't give off any natural Gas nor formation of oil.
