Final answer:
The state that has Guadalupe Mountains National Park, Big Bend National Park, and Padre Island National Seashore is Texas.
Step-by-step explanation:
The state that has Guadalupe Mountains National Park, Big Bend National Park, and Padre Island National Seashore is Texas. Guadalupe Mountains National Park is located in western Texas and is known for its diverse geologic formations, including a massive limestone reef. Big Bend National Park is situated along the Mexico–United States border and is famous for its canyons and desert landscapes. Padre Island National Seashore is located on the Gulf Coast of Texas and is known for its beautiful beaches.