The sentence which best reveals the writer's beliefs about the impact of beavers on Chilean ecology is, the entire incident should teach people a lesson: it is a mistake to mess with nature.
Answer: Option D.
Step-by-step explanation:
Beavers are a large species which belong to semiaquatic rodent. They are a friendly animal who plays a big role in ecosystem. The impact beavers have on Chilean ecology is quite huge and advantageous.
But if we go on eradicating beavers then we are creating a problem for ourselves. Beavers reshape our environment by building dams and canals which is done by cutting tree trunks and branches. The writer points out facts through which we get a lesson that messing up with nature can be a huge mistake.