The answer is D. irrigation system.
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>
Answer: Counties states and municipalities
A local government is an administrative body for a small geographic area like a city, a town, a county, or a state. They were given powers by the higher level of government but have control only their specific geographical region and enforce laws only on their area.
Counties states and municipalities are all levels of local government.
