The answer is "<span>libretto".
</span><span>The text, or book, of a musical dramatic work is called the libretto.
</span>Libretto is derived<span> from </span>Italian and is<span> diminutive of the word </span>libro<span> which actually means "Book". The person who writes librettos is called "</span>librettist".
Answer: Her physical illness.
Explanation: Her chronic back pain troubled her throughout the years, and it only worsened later in her life, no matter how she tried with doctors. Her physical illness was the root of this cause.
Answer:
A.) Background vocalist - A, provides additional vocal support to the main vocalist and other members of a musical group during recordings and performances
B.) Session musician - C, lends support under contract to a musical group's leader and helps in recording or performing live music
C.) Performing artist - D, records music in studios or performs music live in front of an audience
D.) Private instructor - B, independently teaches basic- to professional-level music lessons to a student or group
Explanation: I hope this helped! :]