Correct Answer: magnesium

Solution : The correct answer is Magnesium.

Flash bulbs are used by photographers. Flash bulbs are small bulbs that are attached to cameras which provide a bright flash to take photos. It provides a bright burst of light which takes clear photos indoors. The filament of flash bulbs is made up of magnesium metal. When Magnesium burns it provides bright white light which makes it most suitable to be used in flash bulbs.