Principal: focal point - focal point by isolation
Describing form: what is the specific communicative strategy? Where is it found?
When one object or area is isolated from the rest, a focal point by isolation is created.
the old woman in this piece is the focal point being isolated.
Describing content: what does it communicate?
we immediately focus our attention to the old woman in this picture and get a comical sense of dread. Like Marge and Homer are trying desperately to avoid this woman.
Image source:https://www.google.com/search?rlz=1C1SQJL_enUS775US775&tbm=isch&q=simpsons&chips=q:simpsons,g_4:futurama&sa=X&ved=0ahUKEwjW9bCiz8bZAhUH2IMKHXQvCnkQ4lYIMCgA&biw=1920&bih=925&dpr=1#imgrc=p_f0Xjn2CKlj9M: