【初三英语阅读理解LivingSpaceHowmuchlivingspacedoesapersonneed?Whathappenswhenhisspaceneedsarenotmet?Scientistsaredoingexperimentsonratstotrytodeterminetheeffectsofovercrowdedconditionsonman.Recentstudieshaves】

　　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