Which of the following is the process of converting animal tissue into value-added material?

The process of converting animal tissue into value-added material is known as rendering. Rendering is a method used to recycle animal by-products that may not be suitable for human consumption into usable materials. This involves heating the tissues to separate fats from proteins, resulting in valuable products like animal fats, which can be used in food for pets, soaps, and various industrial applications. Rendering transforms what might otherwise be waste into high-value items, making it an essential process in waste management and resource recovery within the livestock industry.

Castration refers to the removal of an animal's reproductive organs and is unrelated to the conversion of animal tissue into materials. Processing is a more general term that can refer to several steps in handling animal products but does not specifically denote the conversion to value-added materials. Packing involves preparing and packaging animal products for distribution and sale, which is again a different process compared to rendering.