For whatever reason , Ennis had changed , and Jack was excited to be the recipient of his new feelings . Still , a small part of Jack remained guarded . Ennis 's history required a bit of self - preservation , and Jack could n't help that . It hurt , but it was necessary .

Question: Why would a part of him remain guarded ?
Answer: He is afraid he will be rejected and will end up heartbroken .He is guarded by a large dog , still .None of the above choices .He is worried someone will steal his belongings .