Final answer:
The four phrases indicating the bird's nervousness about winter are "worried about what she would do in the winter," "didn’t know what she would do," "I am left here alone," and "looking for a place to stay."
Step-by-step explanation:
To discern which four phrases from the texts suggest that a bird is nervous about being left behind in the winter, we should look for expressions that convey worry, solitude, or uncertainty related to the bird's situation. After reviewing the provided excerpts, the phrases that most directly indicate the bird's nervousness about facing winter alone are:
- "worried about what she would do in the winter"
- "didn’t know what she would do"
- "I am left here alone"
- "looking for a place to stay"
The selection of these phrases is based on their direct reference to the bird's concern or predicament as winter approaches, which highlights the bird's sense of anxiety or apprehension.