Which type of law involves a person who breaks a set rule, such as a law against stealing?

Robbing. Burglary.

Explanation:

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

workers of lowell mills were greatly benefited for the waltham type of work which was more a paternalist kind, trying to protect the integrity of this little girls coming from small farmers and providing an adequate place of work, this in an effort to avoid the issues of bad place conditions and immorality that the people in bigger industrialized cities of great britain were experimenting.