Final answer:
In Air from Bach's Orchestral Suite No. 3, an expressive melody played by the first violins unfolds above a steady bass line, exemplifying the baroque music style.
Step-by-step explanation:
For Air from Bach's Orchestral Suite No. 3, carried by the first violins, a richly ornamented and expressive melody unfolds over a steady, even bass line. This Air, commonly known as "Air on the G String", is characterized by its elegant and flowing melody that speaks to the baroque ideal of emotional expression within music. The continuous bass line, often referred to as a basso continuo, provides a harmonic foundation that allows the melodic line to shine prominently.