The following is a sample of a second-grade student's writing. I sw in a bok that a bot went across the sea on a very clode day. Transcription: I saw in a book that a boat went across the sea on a very cloudy day. To best meet the student's needs, the teacher should provide instruction in which of the following?

CVC (consonant-vowel-consonant) patterns focus on three-letter words like "cat" and "dog." While understanding CVC patterns is important for early literacy, the student's mistakes do not primarily relate to the structure of CVC words. Therefore, this instruction would not directly resolve the specific vowel confusion observed in their writing.

Root words are the base forms of words from which other words are derived. The student's writing does not demonstrate a misunderstanding of root words; instead, the issues stem from vowel sounds. Consequently, instruction on root words would not effectively address the student’s current writing needs.

Consonant blends consist of two or more consonants combined to create a distinct sound, such as "bl" in "black." The errors in the student's writing are not related to blends but rather to vowel usage. Therefore, focusing on consonant blends would not meet the student's specific instructional needs.