Here's why:
* Matter mechanics refers to the physical properties and behavior of matter. This is unrelated to the other options.
* Punctuation deals with the use of symbols like commas, periods, and question marks to structure sentences.
* Capitalization focuses on the use of uppercase letters at the beginning of sentences and proper nouns.
* Spelling concerns the correct arrangement of letters to form words.
Therefore, the question is asking about the correct way to write words.