Final answer:
The mouse and the speaker in Robert Burns' poem are different in that the mouse lives in the immediate moment, whereas the speaker is capable of reflecting on the past and fearing the future.
Step-by-step explanation:
The question inquires about the differences between the mouse and the speaker in Robert Burns' poem To a Mouse. The final stanza of the poem reflects on how the best-laid plans of both mice and men often go awry, leading to grief and pain instead of the promised joy. This highlights the difference mentioned in option (c): The mouse is focused on the present, while the speaker reflects on the past and fears for the future. The mouse lives in the moment and adapts to its immediate circumstances. In contrast, humans, represented by the speaker, are capable of looking back in regret and forward in anxiety.