Animals use sound waves for different reasons, mainly to talk to each other and find their way around.

1. Communication:

   • Birdsong: Birds sing pretty tunes to attract partners and mark their territory.
   • Whales: These huge sea creatures make deep sounds to communicate with each other over long distances.

2. Navigation:

   • Echolocation: Bats and dolphins send out sound waves that bounce back off objects. This helps them find food and move around their surroundings.

From these examples, we can see how important sound waves are for animals.