4. Which statement best explains how a decrease in the Boulder Reservoir prairie dog population led to changes in the hawk populations?
A. A decrease in the prairie dog population resulted in a decrease for both hawk
populations, indicating that there was no food for the hawks to eat.
B. A decrease in the prairie dog population resulted in a decrease in the ferruginous
hawk population, indicating that prairie dogs are the main source of food for
ferruginous hawks in this area.
C. The same disease that resulted in a decrease in the prairie dog population
spread to the hawks and resulted in a decrease in both hawk populations.
D. A decrease in the prairie dog population resulted in an increase in the red-tailed
hawk population, indicating that prairie dogs are the main food source of
red-tailed hawks in this area.