A museum is building a collection of works that are preserved for their value as works of cultural heritage. Which of the following works would be best choice for this collection?

A pair of earrings valued at $100,000
An old oil painting that is badly decaying.
A piece of furniture owned by a famous political ruler.
A drawing illustrating an ancient festival.
A drawing illustrating an ancient festival.

The best choice for the collection would be the drawing illustrating an ancient festival. This work will likely hold significant cultural value as it provides insight into ancient traditions, customs, and celebrations. It can help preserve and educate the public about the cultural heritage of the past. The other options, such as the earrings or the decaying oil painting, may have monetary value but may not hold the same cultural significance. The historical furniture could have some cultural value depending on the fame and historical importance of the ruler, but it is not specified in the question.