What type of notes used for ledger lines

In two to four paragraphs, explain what happened musically as britten introduced the orchestral instruments. include a discussion of: -the order in which the instruments introduced the theme, as heard in the first 2: 00 minutes of the piece. -why the composer might have chosen to use different sections of the orchestra to play at different times. -how this piece you gain a better understanding of the orchestra. don't need all of it answered just need something to put down,

The dynamics of a musical piece refer to the a. key signature b. composer’s history c. volume changes d. instrumentation

Literary criticism, critic and critique