Final answer:
Álvar Núñez Cabeza de Vaca was part of an expedition led by Pánfilo de Narváez, not by any of the explorers listed in the multiple-choice question. Columbus, Magellan, Cortes, and Pizarro were all prominent explorers of their time but had separate expeditions and achievements.
Step-by-step explanation:
Álvar Núñez Cabeza de Vaca was an early Spanish explorer of the New World and he did not specifically follow the leadership of the explorers listed in the multiple-choice question. He was part of an expedition initially led by Pánfilo de Narváez. To address the question directly, none of the provided options Christopher Columbus, Ferdinand Magellan, Hernan Cortes, or Francisco Pizarro led Álvar Núñez on his exploration. They were all explorers during the same era but had individual roles and expeditions.
It's worthwhile to note that Columbus is known for his voyages across the Atlantic Ocean, sponsored by the Spanish monarchs, and mistakenly discovering the Americas; Magellan organized the Spanish expedition to the East Indies resulting in the first circumnavigation of the Earth; Cortes conquered the Aztec Empire; and Pizarro conquered the Inca Empire