-People -Take in air -Stay alive -Proof -Things which show that something is present - specialists - facts and events that affect a situation - things that are absolutely necessary - type,kind - examine two things to see how they are similar and different
-People-Take in air -Stay alive-Proof-Things which show that something is present- specialists- facts and events that affect a situation - things that are absolutely necessary - type,kind- examine two things to see how they are similar and different