Two wires dangled from the heart of the machine and gently danced in the breeze. I knotted their frayed ends together with the w
ires that sprouted off the reed, just as I’d always pictured. Down below, the crowd cackled like a gang of birds. “Quiet down,” someone said. “Let’s see how crazy this boy really is.” —The Boy Who Harnessed the Wind, William Kamkwamba What idea does this middle section help to develop?
Building the windmill involved the whole community.
The author did not understand the technical requirements of building a windmill.
No one believed that the boy could build a windmill.
It was a nice breezy day when the boy first operated the windmill.
No they aren't proper to use in writing class they are considered slang. It would show your teacher that your not interested in sounding educated and proper. Hope this helps!