The Aztec build causeways to make travel by land easier.
- Aztecs built causeways to connect the island on Lake Texcoco to the other side for transportation.
- A causeway was an elevated road that allowed the people to travel over the swampy areas without getting wet.
- Causeway was built on the capital city of Aztec called Tenochtitlan to travel from island to mainland.
Thus option D is the correct answer.
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