Ruminantia is a suborder of mammals that includes animals known as ruminants, which are characterized by their unique digestive system. These animals, such as cows, sheep, and deer, have a specialized stomach with four compartments that allows them to break down tough plant materials through a process called rumination. This involves regurgitating and re-chewing food to aid digestion. Ruminants primarily feed on grasses and other fibrous plants, making them essential for many ecosystems. Their ability to efficiently convert plant material into energy supports various food chains and contributes to soil health through their grazing habits.