A) Dry Environments
An arroyo is a dry river bed or seasonally active creek. They are usually found in deserts or other arid climates and completely dry up between periods of activity due to water<span>-less conditions</span>
D. Elect officials to serve in the government
The people choose who they want to hold power by voting
Michael Rogers explains that the four primary subjects united in Comprehensive Musicianship (CM) programs were music literature, harmony, counterpoint and melody, and formal analysis. Other subjects, such as music history, applied music, conducting, and orchestration, might also have been included.
The would be their Background or Demographics....
Hope that helps!!!!