Answer: Longing
Reasoning: The mood is longing because she is waiting and desiring for the food so she can eat.
Are you talking about Marigolds by Eugenia Collier?
The speaker thinks (feels) that her daughter is growing up very fast and uncontrollably, so the speaker feels a wistful feeling towards past years in which her daughter was young and just learning to ride a bike, and the speaker wishes her daughter to remain forever in her chidlike state and never grow up.
In the simplest sense, positive means good or the opposite of negative. If you have a positive attitude about homework, for example, you're more likely to get positive feedback on your report card.