Question

1. sonar technology sends out a pulse of sound, often called a ___. *

longitudinal wave
echo
transmission
ping
other:

Explanation:

Sonar technology emits a sound pulse which is commonly referred to as a ping. A longitudinal wave is a type of wave - form, an echo is the reflected sound, and transmission is a general term for sending something out but not the specific term for the sonar sound - pulse.

Answer:

D. ping