Final answer:
In the novel 'Fahrenheit 451', Faber chooses not to give Montag another 'green bullet' to keep in touch due to the risk of being discovered by the authorities. It could expose Faber's involvement in Montag's rebellion against the oppressive society.
Step-by-step explanation:
In the novel 'Fahrenheit 451' by Ray Bradbury, the 'green bullet' refers to a tiny communication device that Faber gives to Montag. It allows them to communicate with each other through their ears. However, Faber chooses not to give Montag another 'green bullet' to keep in touch because it poses a risk of being discovered by the authorities.
Faber is fearful of being caught by the government, as possessing the 'green bullet' is illegal in their dystopian society. If Montag were to be found with the communication device, it could expose Faber's involvement in Montag's rebellion against the oppressive society.
Therefore, Faber decides to limit his communication with Montag to avoid putting both of them in danger. By not providing Montag with another 'green bullet', Faber is taking precautions to protect himself and their underground resistance movement.