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Throughout history, the bones, bladders, and horns of animals have been used to create tools.

livestock
animal by-products
animal science
animal husbandry

Respuesta :

NobleXenon

Answer:

Animal by-products.

The USDA (United States Department of Agriculture) defines an animal product as anything made from an animal, excluding muscle meat.

hayhay104322

Answer:

the answer is animal by-products

Explanation: