What is most likely to harm people living near a volcano?

People living near a volcano are most likely to be harmed by eruptions, which can produce lava flows, pyroclastic flows, and ashfall. These phenomena can lead to destruction of property, loss of life, and respiratory issues due to volcanic ash. Additionally, secondary hazards such as mudflows (lahars) and toxic gas emissions can pose significant risks. Preparedness and early warning systems are crucial for mitigating these dangers.