Which of the following prefixes implies duplication when attached to a root word?

In this sentence, the adverb "slowly" is used correctly to modify the verb "wrote," indicating the manner in which the student wrote. Additionally, the adjective "slow" is appropriately used to describe the writer in the second part of the sentence.

In this sentence, the subject "Physics" is treated as a singular noun, and the verb "is" agrees with the singular subject.

This sentence is complete because it contains a subject ("Matt") and a predicate ("spent most of the summer training for the marathon"), forming a complete thought. The other options are fragments that lack essential sentence elements. Option A is a fragment due to the missing main verb. Option C lacks a conclusion after the dependent clause. Option D has no main clause to form a grammatically correct sentence.

The modifier "that needed paint" is intended to modify the noun "truck," but it is placed ambiguously, suggesting that the garage needs paint instead. This creates a dangling modifier because it's not clear what the modifier is meant to modify.

"Similarly" is a transitional expression that indicates a similarity or parallel between ideas. It is commonly used to show a sequence of events or actions that are alike or comparable.

This option correctly uses a comma after "dull" to separate the introductory clause from the main clause. Additionally, it correctly uses an apostrophe in "it's" to indicate the contraction of "it is."

A pronoun is a word that takes the place of a noun. In this sentence, "us" is a personal pronoun referring to the speaker and a group of people. It functions as the object of the preposition "for." Personal pronouns like "us" are commonly used to avoid repetition of nouns in sentences.

"Conscientious" means being careful, diligent, and guided by a strong sense of responsibility. The correct spelling includes the root "science," derived from the Latin word "scire," meaning "to know." The other options are misspellings that do not match the correct form of the word.

The prefix "inter-" implies the idea of between or among, often indicating a relationship or interaction between two or more things.

The best concluding sentence should reinforce the main idea of the paragraph while providing a strong closing statement. Option C effectively restates the call to action presented earlier in the paragraph, emphasizing the importance of preventing littering to protect wildlife. The other options either repeat existing information or do not effectively wrap up the paragraph.