During 1,000 AD in European cities a "guild was formed to protect its workers. This
resembles present day what?

A. labor union
B. military
C. state government

A. Labor Union
To protect our workers we form labor unions. An example is the teachers labor union that band together so that the school board and school district presidents don't abuse their power and under cut school funding or pay teachers less. Or even give them not enough vacation days. It allows for the workers to have more power when together.

Slave labor.  slave labor was an essential part of the economy of spanish polish colonies.