Answer:
a. The positioning of the bite mark enhances the message 'No sin'.
Step-by-step explanation:
Based on the popular story of Adam and Eve in the garden of Eden, where the two was said to have sinned against God, by eating or biting from the forbbiden fruit.
Thus, in this case, with the promotion for a brand of ketchup showing a part of the fruit that was bitten, is trying to link the popular Adam and Eve story to the picture, such that people or audience can easily remember the promotion and that biting or eating from the ketchup is not a sin.
Hence, positioning strategy that best explains the cognitive values is that, the positioning of the bite mark enhances the message 'No sin'.