Final answer:
In 'To Kill a Mockingbird', Mr. Radley shoots at the children for trespassing onto his property, provoked by their curiosity about Boo Radley.
Step-by-step explanation:
Mr. Radley shoots at the children in To Kill a Mockingbird because they trespass onto the Radley property, driven by curiosity about the mysterious and reclusive Radley family, particularly Boo Radley. The situation escalates to the point where Mr. Radley believes his privacy is being invaded and his property threatened, prompting him to take such drastic action.