Which of the following is NOT recommended as a precaution before lighting a fire?

The option that is not recommended as a precaution before lighting a fire is having a crowd gather to watch. This choice is incorrect because gathering a crowd can pose safety risks. When a fire is lit, it is important to maintain a safe environment, ensuring that only those necessary are present to manage the fire. A crowd increases the likelihood of accidents, distractions, and potential harm, which goes against the principle of safety measures that should be in place prior to igniting a fire.

In contrast, removing flammable materials from the vicinity, ensuring that a firefighting method is readily available, and checking that all flue passages are clear are all standard precautions taken to ensure safety and prevent unwanted fires from spreading. These actions help minimize risks associated with fire, making them vital practices to follow when preparing to light a fire.