Concept:Storage and maturation of spermatozoa in the male reproductive system.Explanation:Spermatozoa are formed in the seminiferous tubules of the testes.These sperm cells are immature when they first leave the testes.They are transported to the epididymis, a coiled tube attached to each testis.Inside the epididymis, the spermatozoa mature and are stored until ejaculation.Therefore, the epididymis is the part that stores immature spermatozoa in animal production.Answer:C. epididymis