Answer:
1: The coach was admonishing them, bringing up each of their deficiencies.
2: The birds were iridescent, yet they had a strong dissonance.
3: The little boy was malicious and threw the snowball at the lady, who became transfixed.
I'm not sure how good these are, but I hope it helps some. These are just examples.
Courage is important because it gives you a chance to be outspoken
The author develops the theme by having Ennis make a suggestion to exchange lives for an afternoon