Final answer:
Hernán Cortés arrived in what is now Mexico, not South America, and did set fire to his ships. The reconquering of the Iberian Peninsula was a military and religious action by the Spanish. Recruiting native allies was crucial in the conquest of the Aztecs, and Sir Walter Raleigh did attempt to colonize Roanoke.
Step-by-step explanation:
The claim that after Hernán Cortés arrived in South America, he set fire to all his ships to prevent his crew from returning home is false. Hernán Cortés never arrived in South America as part of his initial expedition; rather, he landed in what is now Mexico, specifically in the Yucatan Peninsula.
Regarding the second statement, the majority of the natives killed in the exploration period due to having inferior weapons is both true and false. While warfare and diseases brought by Europeans did lead to significant deaths among the indigenous populations, it was not solely due to superior European weapons, but also due to smallpox and other diseases to which the Native Americans had no immunity.
The Spanish reconquering the Iberian Peninsula was both a military and religious action, making that statement true.
To the statement that recruiting native allies played an important role in the Spanish conquest of the Aztecs, this is true. Cortés strategically forged alliances with groups that were opposed to the Aztecs, aiding in his conquest.
Finally, Sir Walter Raleigh was indeed the man behind the attempt to colonize Roanoke, making that statement true.