    ‘Séntenée 1: Southern California's. economy: can. be  described as. one of the targest:in the United States  ahd what other characteristic?    ‘Sentence’ 2: It is’ dominated and’ heavily. ‘dependent.  upon, abundaricé 6f petroleum, as ‘oppdsed to: other  regions where: automobiles’ not “nearly as: dominant;  the'vast majority of transpost runs ori-this fuel,