Answer:
internal validity
Explanation:
because of the manipulation of the independent variable and control of extraneous variables
The answer is superseding. An intervening cause will by and large clear the tortfeasor of obligation for the casualty's damage just if the occasion is esteemed a superseding cause. A superseding cause is an unforeseeable intervening cause. By differentiate, a predictable intervening cause commonly does not break the chain of causality, implying that the tortfeasor is as yet in charge of the casualty's damage—unless the occasion prompts an unforeseeable outcome.
The oil would not be there to help our need for transportation and we would have to develop without 5he use of oil anymore
