Answer: A
Euridice by Jacopo Peri is the earliest opera that has been preserved.
<span>Polyphony:
In music, polyphony is one type of musical texture.
A texture in music is the way that melodic, rhythmic, and harmonic aspects of a musical composition are combined to shape the overall sound and quality of the work.</span>
Answer:
Dr. Salk has assisted foreign countries by providing technical information.
Explanation:
