Final answer:
A megalithic tomb chamber built with the post-and-lintel method is called a dolmen.
Step-by-step explanation:
A megalithic tomb chamber built with the post-and-lintel method is called a dolmen. A dolmen is a type of tomb characterized by large stone slabs, or megaliths, placed horizontally on top of vertical stone supports. This construction method allows for the creation of a chamber-like space within the tomb.
Learn more about Dolmen