Which of the following is listed as an explosive?

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Explosives are substances or devices designed to release a large amount of energy rapidly, through detonation or a very fast combustion, producing a blast. Dynamite fits this category because it contains nitroglycerin stabilized in a carrier material and is intended to detonate to release energy quickly. The other items do not contain energetic materials or are not designed to detonate: a first aid kit holds medical supplies, a flashlight is a portable light source, and a calendar is simply a date-planning tool. So, the only item listed that is classified as an explosive is dynamite.