Final answer:
The crop stores and moistens food, the proventriculus secretes enzymes for digestion, and the gizzard grinds and crushes food particles.
Step-by-step explanation:
Crop: The crop is a part of the digestive tract of a hen which acts as a storage organ for food. It allows the hen to store and moisten the ingested food before it is further processed in the digestive system.
Proventriculus: The proventriculus is the glandular stomach of a hen. It secretes enzymes and acids that aid in the breakdown of food and the initial stages of digestion.
Gizzard: The gizzard is a muscular organ of a hen's digestive tract. It helps in grinding and crushing ingested food particles with the help of small stones or grit that the hen has swallowed.
Learn more about Parts of the digestive tract in a hen