Final answer:
Volcanic bombs are the pyroclastic material ejected during a volcanic eruption that is greater than 64 millimeters in diameter.
Step-by-step explanation:
The pyroclastic material ejected during a volcanic eruption, composed of incandescent lava that is greater than 64 millimeters (2.5 inches) in diameter, is called volcanic bombs. These are large, solid fragments of rock that are expelled from the volcano with considerable force. They can range in size from a few centimeters to several meters in diameter.