He could hear her breathing - slow , regulated . He felt that familiar pang from somewhere inside the darkness that he denied . That slow , relaxed - unknowing - breathing of prey being watched . He selfishly would miss these moments if she was turned .

Question with options to choose from: What may be the reason for someone being so jealous of breathing ?
OPTIONS:
(1). None of the above choices .;
(2). They have a respiratory illness .;
(3). They are n't human .;
(4). They are an animal .;
(3).