c) California

California boasts the most national parks of any U.S. state, with a total of nine. These parks showcase the state’s remarkable natural diversity, ranging from the dramatic cliffs and waterfalls of Yosemite to the immense sequoias of Sequoia and Kings Canyon National Parks. Other notable parks include Death Valley, Joshua Tree, Channel Islands, Redwood, Lassen Volcanic, and Pinnacles. Each park offers unique landscapes and ecosystems, making California a premier destination for nature lovers and outdoor enthusiasts.