noun, plural agencies. 1. an organization, company, or bureau that provides some service for another: a welfare agency. 2. a company having a franchise to represent another. 3. a governmental bureau, or an office that represents it.
Causeways and Canals. Early on in the history of the city the Aztecs built causeways and canals for transportation to and from the city. A causeway is a raised road that allowed the people to easily travel over the swampy and wet areas. There were three major causeways that led from the island city to the mainland.
The main city and other islands were linked to the shore of the lake by causeways. In absence of streets, people walked along footpaths beside canals. Due to a lack of land to cultivate in the region, the Aztecs created manmade islands where they grew vegetables, herbs, medicinal plants, and flowers. These islands were known as chinampas and were made by weaving rush plants, then covering them with layers of mud, and securing them to poles drilled into the lake bed.