Which explosive is characterized by its use in military applications and is typically bright yellow?

Picric acid is correct because it is known for its historical use in military applications as an explosive due to its high sensitivity and power. It typically has a distinct bright yellow color, which sets it apart from other explosives. This characteristic color is a result of the compound itself and serves as a visual cue for identification. Picric acid has been used in various types of munitions, especially during World War I, making it well-known in military contexts.

Other explosives, such as mercury fulminate, nitroglycerin, and dynamite, do not share this particular visual characteristic or the same focus on military applications to the extent that picric acid does. For example, although nitroglycerin is also a powerful explosive, it is typically a colorless or pale yellow liquid, and dynamite is often associated with being a stabilized form of nitroglycerin. Mercury fulminate is primarily used as a primer rather than as a main explosive charge in military applications. Therefore, picric acid's unique properties and history directly associate it with military uses and its distinctive yellow color.