Give an example of a situation when identifying sounds quickly and correctly
be the difference between life and death.

One example: the sound of a rattlesnake.

Rattlesnakes usually make a “rattling” sound, therefore being called a rattlesnake. But, hearing this could save your life, if you take the right measures and get away from the snake. This sound is a warning sound, and can sometimes help people get away when they hear the sound. Although sometimes it might not kill you if treated quickly. The bite is painful and deadly

the answer is "began" because it is a action that can be done