Why does douglass change his name from bailey to johnson to douglass, as stated in chapter 11 of narrative of the life of frederick douglass?

the correct answer is because There are too many Johnsons in his area

the Aztec economy was based on three things: agricultural goods, tribute, and trade. Aztec trade was crucially important to the empire; there could be no empire without it as many goods used by the Aztecs were not produced locally.

Explanation:

Due to its island location the Aztec economy was based primarily on agriculture in the form of chinampas. Also referred to as 'floating gardens' chinampas were mounds of dirt and other debris built up in the shallow, swampy areas of Lake Texcoco which surrounded Tenochtitlan.