Which salivary gland is located beneath the lower jaw?

The submandibular salivary gland is positioned beneath the lower jaw, making it the correct choice. This gland is responsible for producing saliva and plays a crucial role in the process of digestion as well as oral health. It is located in the submandibular space, which is below the mandible (the lower jawbone), and it has ducts that open under the tongue, contributing to the overall flow of saliva in the mouth.

The parotid gland, while also a salivary gland, is located in front of the ear and primarily produces saliva that enters the mouth through ducts near the upper teeth. The sublingual gland is found beneath the tongue and also contributes to salivation but is positioned higher than the submandibular gland. The pituitary gland, on the other hand, is an endocrine gland located at the base of the brain and is not associated with saliva production. Therefore, the submandibular gland's specific anatomical location beneath the lower jaw is what makes it the accurate answer to the question.