Answer:
foreshadowing
Step-by-step explanation:
Foreshadowing is among the most powerful writer tools. It is the use of information or story details to indicate or suggest future events, whether good or bad. In this case, the foreshadowing serves to increase tension and invoke the reader's concern with that "peace" that animals are living. The outcome of what will happen is still uncertain. The foreshadowing in this excerpt serves to prepare the reader for a great negative turn in the way of the animals.