Queen Isabella and King Ferdinand joined forces to get rid of the Muslims in the south. With the support of the pope they where able to recon cure the the last bit of Muslim land.
Queen Isabelle wanted the whole kingdom to be one religion, so the Inquisition was created to find anyone who wasn't truly christian or didn't convert to Christianity . if u where cought by the inquisition, the punishments would be: getting thrown in a dungeon or torture or getting burnt.
the Spanish funded explorations to find new lands and to establish new trade routes to Asia. Exploration provided opportunities to expand their empire.