Final answer:
The embryonic germ layer that develops into the digestive tract and organs derived from it is the endoderm.
Step-by-step explanation:
The embryonic germ layer of tissue in animals that develops into the digestive tract, and organs derived from the digestive tract, is the endoderm. The endoderm gives rise to the lining of the digestive tract, including the stomach, intestines, liver, and pancreas, as well as the lining of the respiratory tract.