Answer:
Level 3
Step-by-step explanation:
Level 1 is plants, they eat sunlight and photosynthesize (Grass)
Level 2 is herbivores which eat the plants (Rabbits)
Level 3 are carnivores that eat the herbivores (Foxs)
Level 4 is near the top of the food chain, carnivores that eat other carnivores (Eagles)