Final answer:
Francisco Coronado discovered the Grand Canyon, Hernando de Soto discovered the Mississippi River, Vasco Nunez de Balboa discovered the Pacific Ocean, and Christopher Columbus discovered Cuba.
Step-by-step explanation:
1. Francisco Coronado discovered the Grand Canyon.
2. Hernando de Soto discovered the Mississippi River.
3. Vasco Nunez de Balboa discovered the Pacific Ocean.
4. Christopher Columbus discovered Cuba.