The answer is: D. identifying an audience for the product.

Cubing is methodology that use the following six perspectives of a topic:

1. Describing: Physical characteristics of the topic

2. Comparing: Similarities and differences of the topic against other  

3. Associating: Find thing that this topic make you think of

4. Analyzing: Evaluate the components and their relation

5. Applying: Validate the uses or application of your topic

6. Arguing: Discuss the pros and cons of the topic

Each one of this part can be link to an option except the option D

A. describing physical attributes of the product. -> 1

B. relating your product to something else. -> 3

C. telling how your product can be used.-> 5

D. identifying an audience for the product. -> Is not a part