Which physiological feature confirms the roe deer's classification as a ruminant herbivore?

Answer

Specialized stomach chambers for microbial fermentation

As ruminants, roe deer possess specialized stomach chambers designed to host microbes that break down tough cellulose found in plant cell walls through fermentation.

Which physiological feature confirms the roe deer's classification as a ruminant herbivore?
dietmammalherbivoreCarnivoreRoe deer