In a forest, wolves feed on moose. The graph shows a sudden decline in the wolf population due to the outbreak of a disease after the 1980s.
What effect did this decline have on the forest ecosystem?
• A. There will be more competition among the moose for food.
B. There will be less competition among the moose for food
• C. The moose population will increase indefinitely.
• D. The wolf population will compete more for food.