Final answer:
A face with a wide forehead and narrow jaw is described as a heart shape, distinguishing it from round, oval, and diamond shapes by its broader brow and tapering lower half.
Step-by-step explanation:
The face shape described as having a wide forehead and narrow jaw is typically known as a heart shape. Contrary to round, oval, and diamond shapes, the heart-shaped face is characterized by a broader brow and a tapering lower half. The description provided is very much in line with common attributes associated with a heart-shaped visage which includes a forehead that may be wider than the cheekbones, and a chin that is narrow and pointed.