Why did cortez take moctezuma hastage?

Hernán Cortés took Moctezuma II hostage to exert control over the Aztec Empire and leverage power during the Spanish conquest of Mexico. By capturing the emperor, Cortés aimed to manipulate him and the Aztec people, using Moctezuma's authority to facilitate Spanish domination. This strategy was part of Cortés's broader plan to gain riches and expand Spanish influence in the region. Ultimately, this action led to significant conflicts and the downfall of the Aztec Empire.