Answer:
fermentation
Step-by-step explanation:
Ruminant animal food is partially digested and stored as cud. Cud refers to the partially fermented food that ruminant animals, such as cows, sheep, and goats, regurgitate from their rumen to chew again. This process, known as rumination, allows the animals to further break down the food and extract more nutrients before it is fully digested and absorbed in their digestive system. By storing the partially digested food as cud, ruminant animals can maximize their ability to extract nutrients from plant material, which is often tough and fibrous.