When the root word 'kitap' (book) is followed by the accusative case suffix, what is the correct form, and what vowel harmony principle is demonstrated?

When the root word 'kitap' (book) is followed by the accusative case suffix, the correct form is 'kitabı'. This demonstrates the vowel harmony principle of backness. Vowel harmony is a phonological rule in Turkish where vowels within a word tend to agree in certain characteristics. Backness refers to the position of the tongue when producing a vowel; back vowels are produced with the bac....