Final answer:
Álvar Núñez Cabeza de Vaca's expedition wanted to go to Florida because Spain saw it as a strategic area to confront French and English privateers using it as a base for attacks.
Step-by-step explanation:
The expedition led by Álvar Núñez Cabeza de Vaca wanted to go to Florida because Spain viewed it as a logical extension of their Caribbean empire and a strategic area to confront the French and English privateers who were using Florida as a base to attack. Spain had gained a foothold in Florida in 1513 with the claim made by Juan Ponce de León, and by the 1560s, they needed an outpost to counter the French and English activities in the region.