What type of research compares naturally formed or preexisting groups rather than employing random assignment to conditions?

answer; ///he or she can either go to court or not. if he or she doesn't go, he or she must send a witness to stand for them, if he or she doesn't send a witness, he or she will be issued a bench warrant ,captured and forced to go to court; good luck

well this isn't a question but if you are asking if it is true or false it is, true.

the last day of school because i didn’t have to go to school the next day

answer; generalizability;