💡 Detailed Explanation
The adverbial noun '遠く' (far away / distance) is read as 'とおく' (tōku). Sentence translation: 'You can see a beautiful mountain in the distance.' '遠' (far) is read as 'とお' (tō). The other choices are 'おおく' (many), 'ちかく' (near), and 'ひろく' (widely).