Final answer:
Bel Canto is the style that means 'beautiful song' and exhibits long, beautiful phrases in opera. It is known for its lyrical melodies, elegant phrasing, and vocal agility.
Step-by-step explanation:
The style that means 'beautiful song' and exhibits long, beautiful phrases in opera is Bel Canto. Bel Canto is a style of singing characterized by lyrical melodies, elegant phrasing, and vocal agility. It emphasizes the beauty and expressiveness of the voice, with long melodic lines and elaborate ornamentation.