In the concluding paragraph, Thoreau develops two metaphors regarding time and the intellect. What are they? What is their effect?
a) Metaphors: Clock and compass; Effect: Emphasizes the importance of time and direction in intellectual pursuits.
b) Metaphors: Clock and calendar; Effect: Highlights the cyclical nature of time and the need for routine.
c) Metaphors: Time and tide; Effect: Reinforces the inevitability of change and the need to adapt.
d) Metaphors: Time and space; Effect: Stresses the importance of context and perspective.
