Question

What ways/reasons did the pope use to motivate Christians to
join the Crusade?

Answer 1

He called upon the Crusades by bringing Christians in Europe to war against Muslims to reclaim the Holy Land

Answer 2

The pope motivated the christians to join his crusade by saying they needed to reclaim the holy land from the Muslims

Step-by-step explanation:

giving rise to the Crusades by calling all Christians in Europe to war against Muslims in order to reclaim the Holy Land, with a cry of "Deus volt!" or "God wills it!" this also shows that he used the christians beliefs to claim the "holy land"