Question

22 the graph shows the change in the size of a bird population overtime. bird population growth which two factors can best explain the shape of the area labeled by a question mark on the population - growth curve? a the population immigrated to a different geographical location. b a treatment for a communicable disease was given to the birds. c there was competition among the birds for available resources. d some birds were unable to find shelter from predators.

Explanation:

• Option A: If the population immigrated, the curve would likely show a decrease in the original area, not the flattening as seen.
• Option B: A treatment for a disease would likely increase the population, not cause the flattening.
• Option C: Competition for resources limits population growth, which can cause the curve to level off as seen in the marked area.
• Option D: Predation can limit population size. If some birds can't find shelter, it contributes to the population not growing further, aligning with the curve's shape.

Answer:

C. There was competition among the birds for available resources.
D. Some birds were unable to find shelter from predators.