I want to know the answer to the following question:
What are fermatas?
All the background I'm provided with is that "The performer and/or the conductor have a range of options for musical expression and interpretation of a scored piece, including the phrasing of melodies, the time taken during fermatas (held notes) or pauses, and the use (or choice not to use) of effects such as vibrato or glissando (these effects are possible on various stringed, brass and woodwind instruments and with the human voice).". Is that enough to answer the question?
Answer: yes