Final answer:
Most houses in Mérida are built with stone and concrete blocks due to the region's geology and climate.
Step-by-step explanation:
Most houses in Mérida are built with stone and concrete blocks. This is due to the region's geology, which is rich in limestone. Stone and concrete blocks provide durability and insulation against the intense heat of the Yucatán Peninsula. Additionally, these materials are readily available and affordable.
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