Final answer:
Motivated sounds are the sounds that recreate the noises of everyday life to enhance the realism of a play.
Step-by-step explanation:
The sounds that recreate the noises of everyday life and help create the verisimilitude of a play, but are not specifically called for by the script, are called motivated sounds. These sounds are used to enhance the realism of the production and create a more immersive experience for the audience. For example, if a play is set in a bustling city, the sound designer might include sounds of car horns, sirens, and people talking in the background to make the scene feel more authentic.