The sentence which contains an error is "This stream of immigration have resulted in an extremely diverse population with many different cultures and languages." The verb used should be "has" rather than "have" because the subject of the sentence is the singular "stream."

This sentence does not correctly use parallel structure between elements. “Swapped” and “comparing” should be formatted similarly. The corrected sentence reads, "The buzz of unfamiliar languages filled the room as international travelers swapped stories and compared adventures."

This sentence does not demonstrate proper parallel structure among the elements in the list. Each should be formatted similarly. So, because the first two elements in the list are gerunds ("running" and "cleaning"), the noun phrase "records of inventory" should be changed to a gerund as well. The corrected sentence reads, "When I worked for Mr. Tipler, my daily duties included running the cash register, cleaning the store, and recording inventory."

This sentence has a problem with parallel structure. Each element in the list should be formatted in the same way grammatically, but the verbs read “finish . . . start . . . taking.” The last one shouldn’t be an "-ing" verb. The corrected sentence reads, "Before she could leave work on Friday afternoon, Laura was told to finish entering the week’s data, start setting up for the upcoming event, and take out the trash."

This sentence compares two unlike things: the action of making ice cream and the description of “store-bought.” Structure these two things similarly for the sentence to make more sense: "I would rather make my own ice cream than buy it from the store."

This sentence does not employ proper parallel structure between the items in its list. The first two are nouns ("wit" and "candor"), but the third is a verb ("smiling captivatingly"). Make this a noun for the sentence to run more smoothly: "With wit, candor, and a captivating smile, the performer entranced the audience in the small dinner theater."

This sentence has an illogical comparison. It is comparing a seat to a plane, but it means to compare two seats on different planes. The corrected sentence reads, "Plane ticket prices fluctuate wildly, and it is never quite clear why one seat costs several hundred dollars more than another."

This sentence has an illogical comparison. It means to compare the facade on Mary’s house to that on Polly’s, but instead it compares the facade to Polly herself. The corrected sentence reads, "The facade of Mary's Victorian-style mansion is in much worse shape than that of Polly's."

This sentence has a problem with parallel structure. The first two elements in the list are adjectives, but the third is a verb-adjective combination. It is better to keep these consistent. The corrected sentence reads, "The hummus sold at the corner market is organic, locally-made, and delicious."

"Home" contains the error in this sentence because parallel sentence structure dictates that each part in a series must use the same type of word and employ the same tense, if the words are verbs. In this case, the first two parts in the series are prepositional phrases ("to the park" and "to the store"), but the third part is a noun "home." Because only part of one of the prepositional phrases is underlined, we can't change them, so we would need to change the noun, "home," to correct the sentence's error.