Final answer:
In solfeggio, the second scale degree of a major scale is known as 'Re'. This method assigns syllables to the notes of a scale to aid in pitch recognition and sight singing.
Step-by-step explanation:
Using solfeggio, the second scale degree of a major scale is referred to as Re. In solfeggio, which is a music education method used to teach pitch and sight singing in Western music, each note of a scale is given a particular syllable. The first scale degree is called 'Do', and the sequence continues with 'Re', 'Mi', 'Fa', 'Sol', 'La', 'Ti', and returns to 'Do' for the octave.