What type of pyrotechnic device typically requires an integral mortar?

A mine is a type of pyrotechnic device that typically requires an integral mortar. Mines are designed to launch effects high into the air, where they will explode to create a visual display. The integral mortar is essential for safely containing the pyrotechnic composition and directing the projectile upward. This ensures that the device functions correctly and the effects are safely projected away from spectators, which is a critical consideration in the safe operation of fireworks.

In contrast, the other choices refer to different concepts in pyrotechnics. A holder is used to securely position fireworks but does not contain a mortar. A magazine is a storage facility for fireworks and is designed for safety, but it is not a device for launching pyrotechnics. An oxidizer is a chemical component in fireworks that supports combustion but does not represent a type of pyrotechnic device itself. Therefore, the integral mortar is a crucial component of a mine, making it the correct answer.