Question

Based on the food web, correctly predict how changes in the number of a certain species affect the balance of the ecosystem. Choose each correct statement by clicking on the sentence. (Choose 3)
Responses
A If the number of rabbits increased, the number of grasshoppers increases.If the number of rabbits increased, the number of grasshoppers increases.
B If the number of hawks increased, the number of grasshoppers increases.If the number of hawks increased, the number of grasshoppers increases.
C If the number of rabbits increased, the number of insect-eating birds decreases.If the number of rabbits increased, the number of insect-eating birds decreases.
D If the number of hawks increased, the amount of grass increases.If the number of hawks increased, the amount of grass increases.
E If the number of snakes increased, the number of rabbits decreases.If the number of snakes increased, the number of rabbits decreases.
F If the number of insect-eating birds decreased, the amount of grass increases.

Answer 1

Correct answers: B, C, E.

Brief reasoning:
- B: More hawks → fewer insect-eating birds (hawks eat them) → fewer predators on grasshoppers → grasshopper numbers increase.
- C: More rabbits → they eat more grass → less grass for grasshoppers → fewer grasshoppers → insect-eating birds (which eat grasshoppers) decrease.
- E: More snakes → more predation on rabbits → rabbit numbers decrease.