According to the thirteenth amendment, who could be forced to work without pay?

  Those who are punished for committing a crime.

Explanation:

  The thirteenth amendment abolished slavery and involuntary servitude except for penal labor.

  This exception allows to those prisoners who had already been convicted of crimes to be required to perform labor or another punishment while in custody. But to do that they must be convicted, not be waiting for the trial.

  I hope this answer helps you.

answer; /// i believe that they became successful farmers; ///////////////

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!