Question

The graph shows the changes in two populations of herbivores in a grassy field. A possible reason for these changes is that

• A. All of the plant populations in this habitat decreased.
• B. Population B competed more successfully for food than population A did.
• C. Population A produced more offspring than population B did.
• D. Population A consumed the members of population B.

Answer 1

Answer: (B)

Population B competed more successfully for food than population A did.

When population B is increased the population A will decrease, both the population is competing for the same food (grass) and population B is better adapted and competed more successfully for food than population A did. Hence, the correct answer is option B.