A. Horizontal Integration
Because of the colour of there skin
In the baroque period
(and even today) operas began with the overture. It was an instrumental
introduction to the opera. Eventually, these were separated from the opera in
Romantic era and led to the creation/birth of the orchestra <span> and orchestral music such as symphonic poems,
whom composers such as Beethoven and Mendelssohn began to use the term to refer
to independent, self-existing instrumental, programmatic works.</span>
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