<span>Symmetrical balance
is achieved when both sides of a composition look exactly the same by arranging
elements on either side of the center of a composition in an equally weighted
manner. It can also be thought of as 50/50 balance or a mirror image.
Symmetrical balance is used to achieve the effect of order, clarity and
consistency.</span>
Answer:
I would say, depth of field- but you didn't show the image so I'm kinda guessing.
Explanation:
This is a hard one to answer. The reason is that you are asked to distinguish between 2 schools of thought that are very close together. Not only that, but the characteristic you are looking for is not mentioned in either description.
Since semiotics brings in many more fields of study than does iconography, then I would go with iconography. This school of thought seems content just to find the symbols according to its description. What is done with them is mentioned in the other school but is not elaborated upon.
My answer would be iconography.