What is a characteristic feature of an aerial shell?

An aerial shell is specifically designed to be launched into the air, where it bursts to create visual effects. A defining characteristic of an aerial shell is that it contains a black powder lift charge. This lift charge is critical, as it provides the necessary propulsion to elevate the shell to the desired height before it ignites and explodes to produce the visual display. The usage of black powder as the lift charge is a common and traditional method in the design of these fireworks, ensuring that they can reach significant altitudes.

In contrast, the other options do not accurately describe an aerial shell's essential qualities. Aerial shells are not typically liquid explosives, nor are they intended for ground-based effects. Additionally, aerial shells can come in various sizes, often greater than 3 inches in diameter, depending on the intended effect and performance characteristics.