Both diary entries and autobiographies are subjective. Depending on the person who wrote it, the retelling of the same event may differ because everyone experienced and feels things differently. Also socioeconomic status, religion, race etc can have an impact on the experiences of events.
Are you asking what it is?
Declaration of what? united states? to reunite the states
Answer:
Chinampa*floating islands* allowed the Aztecs to grow food and build structures
Pyramids