Answer the following question given this paragraph: 

Sonar uses ultrasound in a way that is similar to echolocation. Sonar stands for so und na vigation and r anging. It is used to locate underwater objects such as sunken ships or to determine how deep the water is. A sonar device is usually located on a boat at the surface of the water. The device is both a sender and a receiver (see Figure below ). It sends out ultrasound waves and detects reflected waves that bounce off underwater objects or the bottom of the water. If you watch the video at the URL below, you can see how sonar is used on a submarine.


Q: What tool, used to locate underwater objects, utilizes ultrasound in a way that is similar to echolocation?

 Choices:

- GPS

- radar

- scanning

- sonar

A:
sonar
