Answer:
Because being undocumented means that you could be deported back to Mexico
Explanation:
Base on the scenario been described in the question, the reason why Jimenez Jimenez describes El Perico as "undocumented," his former owner Don Pancho as "an undocumented farm worker," and Chico and Pilar as "undocumented is because being undocumented means that you could be deported back to Mexico.
