I have two questions that were on a (past due) take home test in my GTR class. There maybe many answers, but I am interested in the best answers. 1) Why is Einstien's GTR a theory of gravity? 2) Why is Einstien's GTR a geometric theory? I welcome anyone who thinks they have an answer to post it, but I am particularly interested in the more sophisticated answers. (In other words, don't look at these as shallow novice questions). I will post my answers (for critique) after I see some of yours.