Final answer:
Ralph Waldo Emerson enjoyed "a perfect exhilaration" and found "perpetual youth" in natural landscapes and the wilderness option (b).
Step-by-step explanation:
The correct answer is b) In natural landscapes and the wilderness.
In his writing, Ralph Waldo Emerson often expressed his deep appreciation for nature and its ability to provide a sense of exhilaration and rejuvenation. He believed that being surrounded by natural landscapes and exploring the wilderness allowed him to experience a perfect exhilaration and find perpetual youth. For Emerson, cities, social gatherings, and historical landmarks did not offer the same kind of rejuvenating and exhilarating experience as the natural world.