b) Nevada

Great Basin National Park in Nevada is known for its ancient bristlecone pines, some of the oldest living trees in the world. These trees, found in the park’s higher elevations, can live for thousands of years, with some specimens in the park estimated to be over 3,000 years old. The bristlecone pines’ resilience and longevity in harsh conditions make them an extraordinary feature of the park. Great Basin National Park also offers a diverse array of landscapes, including mountains, deserts, and caves, making it a unique and important ecological preserve.