What type of spatter results from blood being propelled by a force greater than gravity?

The correct choice refers to cast-off spatter, which occurs when blood is flung off an object as it moves through the air. This type of blood spatter results from a force that exceeds the pull of gravity, often generated by the motion of a weapon or an object during an assault. As the object moves, blood that has adhered to it can break free, creating droplets that travel through the air.

In contrast, other forms of spatter, such as drip spatter, occur when blood droplets fall due to gravitational pull without significant force being exerted. Impact spatter involves blood being expelled due to a force applied directly to the source of the blood, such as a blunt force trauma, but is not the same as cast-off, which occurs from the movement of the object. Spatter from surface tension typically refers to the behavior of blood droplets as they form and collapse but does not involve projection due to an external force. Thus, cast-off spatter is specifically characterized by its creation through greater than gravitational forces during motion.