Final answer:
LP-gas activities that require sources of ignition to be turned off include cooking with propane stoves, heating with propane heaters, and using propane-powered vehicles.
Step-by-step explanation:
LP-gas activities refer to activities involving liquefied petroleum gas. Some examples of LP-gas activities include cooking using propane stoves, heating with propane heaters, and using propane-powered vehicles. These activities require sources of ignition, such as open flames, to be turned off to prevent accidents and explosions.