What happens if only part of an orchestra arrives for a concert? How does that compare to a sentence fragment?

In listening to Haydn's Surprise Symphony, second movement, one can hear contrasts between loud and soft. What type of dynamic change is heard from 1 minute 55 seconds into the piece to the 2 minute mark? The form is ternary and it's performed by a symphony orchestra.

Explanation:

a,b,d are the three sentences that use a reflexive pronoun

keep learning.

explanation:

i guess