Which of the following is the correct spelling?

The conjunction in this sentence is "and," which connects two independent clauses, indicating a relationship between the actions of finishing mowing the lawn and taking a long nap.

The prefix "mis-" means "incorrectly" or "badly." "Misalign" refers to aligning something incorrectly. Prefixes change the meaning of root words. For example, if car wheels are "misaligned," they are improperly positioned, potentially affecting driving performance. The other options contain prefixes with different meanings, such as "ir-" for "not" and "down-" indicating a reduction.

Informal language is typically suitable for casual and personal communication, such as text messages to friends. In more formal settings, like a job application, peer review, or an email to a professor, it is generally more appropriate to use formal language.

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 boy or the girls come to school late," the verb "come" correctly agrees with the plural subject "girls" since the presence of either the boy or the girls triggers a plural verb.

Take a sec, playing firefighter, Hey, gang!phrases are more casual and colloquial, which might be suitable for internal communication within a team but may not be as appropriate in a formal business setting.

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."

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

Proofreading involves reviewing a document to identify and correct errors in grammar, punctuation, spelling, and formatting. Checking for spelling is one of the essential steps in the proofreading process.

"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.