Final answer:
An example of Thoreau's idealism is his critical view of the materialistic society contrasted with the appreciation for nature and solitude, as found in his descriptions of Walden Pond and his simpler, more thoughtful way of life.
Step-by-step explanation:
Henry David Thoreau is often described as an idealist due to his transcendental viewpoint and his emphasis on individualism and nature. An example of his idealistic description can be seen in b) Thoreau's description of the busy, materialistic world. In his works, Thoreau presents a critical view of a society obsessed with material success and suggests that such a lifestyle leads to a loss of individual freedom and a sense of alienation from the natural world. He contrasts this with the simplicity and fulfillment found in nature and solitude, especially in his experiences at Walden Pond (a) Thoreau's description of the natural beauty of Walden Pond) and (c) Thoreau's discussion of his peaceful solitude at Walden).
These themes reflect Thoreau's belief in living simply and in harmony with nature, a sentiment he actively pursued during his time at Walden Pond. Rejecting societal norms, Thoreau provides an idealistic view of a life stripped down to its essentials, focusing on spiritual and personal growth rather than material gain (d) Thoreau's detailed account of his daily routines).