Final answer:
In the story, Nathan Radley scares the children away from the house by locking the nursery from the outside and turning off the nursery, causing the children to become upset. These tactics limit the children's access to the virtual reality room.
Step-by-step explanation:
In the story, "The Veldt," Nathan Radley uses several tactics to scare the children away from the house. One of the tactics he uses is locking the nursery from the outside, trapping the children inside and preventing them from using the virtual reality room. Another tactic is turning off the nursery, which upsets the children and makes them scream and throw things. These scare tactics are meant to limit the children's access to the nursery and make them spend less time in the virtual reality world.