When painting a portrait of a face in proportion, it is important to do all of the following, except

A. to keep the size of the ear the same as the size of the eye.
B. to keep the corners of the mouth lined up with the center of the eyes.
C. to keep the width of the nose the same as the width of the eye.
D to keep the location of the eyes in the center of the head.

A. to keep the size of the ear the same as the size of the eye.

The correct answer is A. To keep the size of the ear the same as the size of the eye.

To determine which statement does not belong in the context of painting a portrait of a face in proportion, we can analyze each option:

A. To keep the size of the ear the same as the size of the eye: This is a valid consideration when trying to maintain proportion in a portrait. It ensures that the relative sizes of different facial features are accurate.

B. To keep the corners of the mouth lined up with the center of the eyes: This is also an important consideration. Aligning the corners of the mouth with the center of the eyes helps to establish proper proportions in the portrait.

C. To keep the width of the nose the same as the width of the eye: This is another valid consideration. Maintaining consistency in the width of facial features contributes to achieving realistic proportions.

D. To keep the location of the eyes in the center of the head: This option seems to stand out because it is not essential for maintaining accurate proportions in a portrait. Although the placement of the eyes is important, it does not necessarily have to be exactly in the center of the head to achieve proportionate rendering of other facial features.

Therefore, the statement that does not belong is:

D. To keep the location of the eyes in the center of the head.

Thus, the answer is D.