Final answer:
The crop is the part of a bird's digestive system that stores and moistens food before it enters the stomach. It is a pouch in the esophagus that later sends the food to the stomach for further digestion. option a is answer
Step-by-step explanation:
The part of the bird's digestive system where food is stored and moistened before it enters the stomach is A) crop. The crop is a pouch in the avian esophagus that stores food. From here, food passes to the first of the two stomachs, the proventriculus, where it is soaked in digestive juices.
The subsequent chamber is the gizzard, which mechanically grinds the food, sometimes with the help of swallowed stones or grit to aid in digestion. The waste is then excreted through an opening called the cloaca. option a is answer