Final answer:
The Reconquista of the Iberian Peninsula by the Spanish was both a military and a religious crusade, making the statement true.
Step-by-step explanation:
The correct answer to the question 'True or False: For the Spanish, reconquering the Iberian Peninsula was a military and religious action.' is a. True.
This historical event is known as the Reconquista, which spanned several centuries.
It was indeed both a military campaign and a religious crusade during which the Christian kingdoms aimed to recapture territory from the Muslim Moors who had conquered most of the Iberian Peninsula.