Final answer:
The coffin is the item most associated with the mummification process and often made of wood. This would be a likely wood sample taken from an Egyptian mummy for study. Other wooden items could include artifacts placed in tombs, but these are not directly tied to the mummification of the body itself.
Step-by-step explanation:
The sample of wood from an Egyptian mummy can be a variety of objects placed in tombs for the afterlife. Among the options provided, the coffin is the most directly associated with Egyptian mummification because it was designed to be the container for the mummified body itself. Coffins were often elaborately decorated and could be made out of wood. While furniture, musical instruments, and sculptures could also be found in tombs, they served as tomb goods for the deceased to use in the afterlife rather than integral parts of the mummification process.
Early Egyptian tombs contained items such as small models of slaves or figures of the gods, with painted wood being a common material used for these models. A funerary portrait, sometimes painted on wood, represented the deceased as they wished to be remembered. The Egyptians also placed canopic jars made from clay with ornately decorated lids to store the removed organs during embalming, except the heart.