Choose the correctly spelled form of the highlighted word. If it is already correct, select “No replacement required”.
The editor admired the writer’s meticulus attention to detail.

The correct option is meticulous.

Explanation:
In the provided sentence, the highlighted word "meticulus" is misspelled.
The correct spelling is meticulous, which means showing great attention to detail, being very careful, and being precise.

Let's break down the options to understand why meticulous is the correct choice:
• No replacement required: Incorrect. The word "meticulus" is missing the vowel 'o' in the adjective suffix "-ous".
• meticulious: Incorrect. It improperly inserts an extra 'i' before the suffix "-ous".
• meticullous: Incorrect. It incorrectly doubles the consonant 'l'.
• meticulous: Correct. It correctly uses a single 'l' and the standard "-ous" suffix ending.