In one-syllable words, when do 'i' and 'o' have long vowel sounds?

The correct answer is that 'i' and 'o' have long vowel sounds when they are followed by a vowel. In one-syllable words, this phenomenon is an application of the basic vowel rules in English phonics. Specifically, when 'i' or 'o' is followed by a single consonant and then another vowel, it creates a situation where the vowel sound is pronounced with its long sound. For example, in the word "bi" or "bo," the 'i' and 'o' are not followed by another consonant, leading to their long pronunciation.

This phonetic rule highlights the importance of understanding vowel combinations and their structural relationships within words, allowing students to master pronunciation and decoding skills. The other options do not capture the correct condition for long vowel sounds specifically in one-syllable words. Understanding these vowel rules is crucial for effective reading and spelling in structured language education.