Question: Verbally explain the difference between a change in "quantity demanded" and a change in demand. Considering the demand side of the market for lawn-mowing services, what kind of change (increase or decrease, in quantity demanded or demand) would each of the following events cause?
a. A new office park, surrounded by several acres of lawn, is built.
b. A drought is declared, and lawn watering is banned.
c. The going price for lawn-mowing services rises.
d. A more natural, wild yard becomes the "in" thing, as people grow concerned about the effects of fertilizers and pesticides on the environment.