Y was the civil war caused

A common explanation is that the Civil War was fought over the moral issue of slavery. ... Meanwhile, the newly formed Republican party, whose members were strongly opposed to the westward expansion of slavery into new states, was gaining prominence.

According to Google

southern north america: yucatán peninsula in southern mexico extending into northern guatemala, and northern belize. these moist forests on the yucatán peninsula of south-eastern mexico are characterized by a tropical humid climate with little topographic relief.

explanation: