In which pair of students do we see a distinct difference in cognitive style?

The answer to the question above is this: During a lecture, David learns more from what the teacher says, whereas Donna can more easily remember the pictures and diagrams the teacher presents.

So, in Psychology, cognitive style is defined as how one person perceives and processes a certain information, thought, or idea. Cognitive style differs from one person to another depending on how the individual thinks. In the given answer above, the lecture given by the same teacher is the same. But David and Donna differ on how they perceive the teacher's discussion. David understands more by listening, while Donna understands more through pictures and diagrams.