Question

8.1.2 dan: semester 2 exam these pictures compare the numbers of prairie dogs in an area at two different times. the picture on the right shows the area 10 years after the picture on the left. which statement best explains the change over the 10 - year period? a. both the immigration rate and the birthrate increased. b. both the birthrate and the immigration rate decreased. c. the emigration rate remained steady, and the birthrate increased. d. the death rate decreased, and the immigration rate remained steady.

Explanation:

The number of prairie - dogs in the area decreased over 10 years. An increase in birth - rate or immigration rate would lead to an increase in population, which is not the case. A decrease in birth - rate and immigration rate would cause the population to decline. Emigration rate remaining steady and birth - rate increasing would not lead to a decline. A decrease in death - rate and steady immigration rate would not cause a decline either.

Answer:

B. Both the birthrate and the immigration rate decreased.