Which is example of how the physical environment helped the Aztecs established a empire? I think the capital city of t e n o c h t i t l a n could be easily defended from attack

Yes, that is correct. The capital city of Tenochtitlan was built on a small island in Lake Texcoco, surrounded by marshes and connected to the mainland by causeways. This physical environment provided natural defenses for the Aztecs, making it difficult for enemies to attack the city. The surrounding water acted as a barrier and the causeways could be easily controlled and defended by the Aztec warriors. This geographic advantage contributed to the establishment and growth of the Aztec Empire.