Read the passage and answer the question: A recent investigation by scientists at the US Geological Survey shows that strange animal behavior might help predict future earthquakes. Investigations found such occurrences in a ten-kilometre radius of the epicentre of a fairly recent earthquake. Some birds screeched and flew about wildly; dogs yelped and ran around uncontrollably. Scientists believe that animals can perceive these environmental changes as early as several days before the mishap. In 1976 after observing the animal behaviour, the Chinese were able to predict a devastating quake. Although hundreds of people were killed, the government was able to evacuate millions of other people and thus keep the death toll at a lower level. — What prediction may be made by observing animal behaviour?