Final answer:
The hollow bits in the mandible, particularly the sockets for the teeth, are referred to as the alveolar process of the mandible.
Step-by-step explanation:
The area of the mandible that contains the hollow bits or deep sockets for the lower teeth is commonly referred to as the alveolar process of the mandible. The alveolar process is the upper border of the mandibular body and serves to secure and anchor the lower teeth within their sockets. The other options: the mandibular foramen, the mental foramen, and the condylar head, refer to other anatomical features of the mandible, but the alveolar process is specifically related to the sockets for the teeth.