初三英语阅读理解
LivingSpace
Howmuchlivingspacedoesapersonneed?Whathappenswhenhisspaceneedsarenotmet?Scientistsaredoingexperimentsonratstotrytodeterminetheeffectsofovercrowdedconditionsonman.Recentstudieshaveshownthatthebehaviorofratsisgreatlyaffectedbyspace.Ifratshaveenoughlivingspace,theyeatwell,sleepwellandproducetheiryoungwell.Butiftheirlivingconditionsbecometoocrowded,theirbehaviorandeventheirhealthchangeobviously.Theycannotsleepandeatwell,andsignsoffearandworrybecomeclear.Themorecrowdedtheyare,andmoretheytendtobiteeachotherandevenkilleachother.Thus,forrats,populationsandviolencearedirectlyrelated.Isthisanaturallawforhumansocietyaswell?Isenoughspacenotonlysatisfactory,butnecessaryforhumansurvival?Theseareinterestingquestions
What'sthepurposeoftheexperimentdescribedinthepassage?
A.Tofindoutifovercrowdedconditionsaffecthumans
B.Tofindouttherelationshipbetweenpopulationandlivingconditions