Final answer:
Beth should keep headphones, a flashlight, and a blanket ready while adding voices to animation to remove background noise and improve recording quality.
Step-by-step explanation:
When Beth is adding voices to the animation she created, she should keep headphones, a flashlight, and a blanket ready. The blanket can be used as a cover to remove background noise, creating a more controlled sound environment for recording.
This makeshift soundproofing can significantly improve the quality of the audio recorded for the animation.
To further enhance the recording process, Beth might also consider using body microphones or wireless microphones, as they are commonly employed by sound designers to capture clear and high-quality audio during production.