What is parallel structure?

Choose the sentence which has a subject and verb that agree the clouds that cover the mood dissipate quickly or harry and joe ran quickly to the bleacher that were without empty seats

If i have enough money, buy a car. a, will b, shall

Laura is writing a report about the natural resources of mississippi. she will collect information about the natural resources from many different sources. one will be a multimedia encyclopedia. when she searches for information in a multimedia encyclopedia, she finds four results. three of the results will laura, but one will not her. which of these articles will not laura write her report? a) "the oil of mississippi" b) "the timber of mississippi" c) "the politics of mississippi" d) "the natural gas of mississippi"