Context: 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: What may be the reason for someone being so jealous of breathing ?
Options:
0. None of the above choices .
1. They have a respiratory illness .
2. They are n't human .
3. They are an animal .
Answer: 2