The grinding of food in grass hopper is done by

Answer: Option D

The grinding of food in grass hopper is done by Gizzard.
The gizzard also referred to as the ventriculus, gastric mill, and gigerium is an organ found in the digestive tract of some animals, including archosaurs, earthworms, gastropods, some fish, and some crustaceans.
In grasshoppers, the gizzard occurs before the stomach, while in earthworms there is only a gizzard and no stomach.