The answer is D. safe and secure.
Waverly is only six when this short story begins. She lives in Chinatown, in San Francisco, and at such a young age, she sees the world in a simple way. As a first-person narrator she says, for instance, that she didn't think of herself as a poor child because her bowl was always full.
In the excerpt, she seems to wish to convey that comfortable simplicity. The smell of food combined with her father leaving to work and the door being locked evoke a sensation of safety, the belief that everything is and will always be just fine.