Which of the following is the correct spelling?

The prefix "re-" indicates repetition or duplication, often suggesting the idea of doing something again.

An adjective is a part of speech used to describe, qualify, or modify a noun. It provides more information about a noun by describing its size, shape, color, quantity, or quality. For example, in the sentence "She wore a beautiful dress," the word "beautiful" is an adjective because it describes the noun "dress." Adjectives help make writing more vivid and specific.

This sentence uses commas correctly to separate items in a list (Keisha, Marius, and Jayma) and sets off the introductory phrase "In short" with a comma.

The adverb "swiftly" describes how the woman ran, indicating the manner or speed of the action.

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.

"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.

In this sentence, the preposition "at" is followed by its object, which is "the clown." The object of the preposition is the noun or pronoun that follows the preposition and relates to the rest of the sentence.

This sentence uses correct capitalization by capitalizing the first letter of "The Red Cross" as a proper noun, and the first letter of the sentence. Additionally, it follows proper capitalization rules for the names of organizations and titles.

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."

Sentence A is punctuated correctly because it maintains proper dialogue formatting. The exclamation mark within the quotation marks correctly conveys the owner's emotion, and the comma before the dialogue tag ("Pat said") is appropriately placed. The closing punctuation is also correct.