Final answer:
The rostral foregut, including the esophagus, is derived from the neural crest cells during embryonic development.
Step-by-step explanation:
The rostral foregut, which includes the esophagus, is derived from the neural crest cells. Neural crest cells are a population of cells that separate from the neural folds during neurulation and migrate to various regions of the embryo, giving rise to different tissues and structures, including parts of the peripheral nervous system.