This sentence does not use the correct form of the verb that follows “found.” The corrected sentence reads: Harold had always found the specialized jargon of artisanal coffee shops to be confusing and intimidating.

This sentence uses a clunky progressive tense when it is not needed. The corrected sentence reads: His family grew up eating a steady diet of meat and potatoes, and now they are reluctant to try new foods like enchiladas and kale chips.

The correct answer is "they."

This is a case of subject-pronoun disagreement. Although the subject in the first clause is "the budget," the subject becomes "the Board of Directors" in the second clause. Therefore, the pronoun must be replacing that subject, and the subject is singular ("the Board of Directors"), while "they" is plural, so it is a definite error. While there are several people, at least more than one, in a Board of Directors, the subject is not the directors, it is the entity itself— the Board. There is only one Board.

Though "was not decided" is in the passive voice, it is not grammatically wrong, just weaker writing. "By" is the correct usage, "and had"  is a verb-verb agreement, both are in past tense.

"Between Jenny and I" is incorrect. In this case, the sentence should say, "Lauren sulked all during school because she felt 'left out,' but the conversation was between Jenny and me, and I had every right to keep it that way." This sentence has a pronoun case error. Since Jenny and the speaker are objects (grammatically) within the sentence, the objective case pronoun ("me") is required, instead of the subjective case pronoun ("I"). In order to better understand these situations, when the phrase includes a noun and a pronoun simply remove the noun before the pronoun, for example, remove "Jenny and." Once you do that, you will much more easily identify the correct pronoun.

Another example: "Dad bought Roger and I a bicycle." As opposed to: "Dad bought (Roger and) I a bicycle." One would not say: "Dad bought I a bicycle."

In this sentence, the pronoun “it” does not match in number with its antecedent “Members.” The corrected sentence reads: Members of the blue team travel around the city collecting buttons, and they will not be able to communicate with the red team at any time.

The error here is "most thorough." Since "thorough" is followed by a verb it is an adverb, and thus must become "thoroughly." The correct way to write this would be "the most thoroughly researched." Adding the "-ly" to an adjective usually makes it an adverb, and every time and adjective is describing another adjective or a verb it must become an adverb. The "it" at the end is the correct pronoun, as "it" is referring to the paper.

This sentence uses the adjective “slow” to describe a the verb “were dimmed.” An adverb would be better. The corrected sentence reads: The lights were dimmed slowly, and the crowd gasped when the blue glow of the painted letters became apparent.

This sentence uses the adjective “previous” to describe the verb “seen.” An adverb would be better. The corrected sentence reads: The sharp beak and beady eyes of a common farm chicken can be terrifying to those who have never seen this animal previously.

The correct preposition to use with the verb “to consist” is “of.” For example, “The Constitution consists of many sections.”

"For" is a preposition error, as well as an idiom error. An idiomatic error is a grammatical error, but one that no longer has any logical explanation; it is simply the way we speak, or write in English. The correct preposition to substitute for would be "to." We take trains "to" cities, not "for" them. An idiosyncrasy is something unique or odd to a person that has no explanation. An idiopathic symptom, or illness, medically, is a condition with an unknown cause.