Final answer:
DART buoys are used to detect tsunamis, while certain animals exhibit behaviors before natural disasters.
Step-by-step explanation:
DART buoys are primarily used to detect tsunamis. These buoys, which stand for Deep-ocean Assessment and Reporting of Tsunamis, are a part of a tsunami warning system. They help monitor and detect underwater seismic activity to predict and warn against potential tsunamis.
Other animals, such as elephants, dogs, cats, sharks, and rodents, also have been observed to exhibit certain behaviors before natural disasters like earthquakes and hurricanes. These behaviors are believed to be due to their sensitivity to small changes in the environment, such as vibrations, air pressure, and smell. For example, elephants may trumpet and flee to higher ground before a tsunami, while sharks may move to deeper water before a hurricane.
Therefore, while DART buoys specifically detect tsunamis, animals can also serve as an early warning system for natural disasters.