When I tryed to be Superman i put on a cape, and a blue suit, i put red goggles on to have laser eyes, but for reason i could not fly. Why? pls help because my brain cell have not evolved yet. Why could i not fly?

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.