Here is the explanation for Question 3:
The graph illustrates a classic predator-prey relationship between rabbits and foxes. Rabbits are the prey, and their population serves as the primary food source for the foxes, which are the predators. When the rabbit population is high, there is abundant food for the foxes, leading to an increase in the fox population. As the fox population grows, they consume more rabbits, causing the rabbit population to decline. Subsequently, with less food available, the fox population also declines. This reduction in predators allows the rabbit population to recover and increase again, restarting the cycle. The peaks and troughs of the fox population typically lag behind those of the rabbit population.