The mood in that scene is of fear and tension mixed with hope. The words that help to identify it are:
The kids going down the steps of their home to go to school.
The mentioning of the military command.
The horns and boos in the air.
The story is "The first day of school" by R. V Cassil.
Explanation:
We can define the mood in that scene as one of fear, tension, and hope since they went to school, but there was a lot of tension around the issue. The words that help us identify the mood are:
the mentioning, the commands, the horns and boos that followed, and the first sentence when the author describes how the kids descended the stairs and went to school.
