What was the main method used to convert people as part of the Spanish Inquisition? the forced payment of large fines
the threat of arrest, violence, or execution
the construction of large Catholic churches
the spread of religious art, books, and literature

In 1478, the Catholic Monarchs began the famous Inquisition to purify Catholicism in all their territories. The Inquisition was established to act as a tribunal to identify heretics and bring them to justice.

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Echosounders

This method of seafloor mapping is called echosounding. Echosounders can use different frequencies of sound to find out different things about the ocean.