Question

a muscular organ that grinds the dirt/food into fine particles. choose an answer crop gizzard proventriculus hen dont know?

Explanation:

The gizzard is a muscular organ in birds (and some other animals) that uses grit (small stones or dirt particles) to grind food into fine particles. The crop is a storage organ for food. The proventriculus is a glandular part of the bird's stomach that secretes digestive enzymes. A hen is a female chicken (a type of bird), not an organ.

Answer:

Gizzard