Since no one has all the answers as to why humans can speak, no one can conclude why animals cannot. The most important component that inhibits animal language is intelligence; their brains are not evolutionarily developed enough to be capable of this behavior. But apart from that, complications would arise in all other aspects of the speech mechanism, from the mouth to the throat, to the ears and nasal passages, even to the lungs. For sheep, one of the main factors to consider is their articulatory system. “Humans are capable of imitating a wide range of noises: the ability relies on the engagement of the larynx to generate acoustic variations and produce new vocalizations. Such vocal plasticity is a key property of human language” (Fedurek & Slocombe, 2011). Sheep do not have the proper mouth and facial muscles to make speech intelligible. This makes vocal plasticity, the ability to create new sounds, impossible; without this supporting speech it will never be possible. Looking specifically at the laryngeal cavity could also explain the sheep's silence. As stated previously, their larynx sits higher in the neck, as well as narrowing at the top and creating a longer supraglottic duct. These anatomical differences could play a key role in the absence of sheep speech. Human newborns, in fact, have the larynx positioned higher up and are not able to communicate orally, so this could prevent