Ответ:
Here are the completed facts:
1. Volcanoes can be under the earth or under the sea.
2. Active volcanoes can erupt again.
3. When a volcano erupts, you can see magma from far away.
4. When a volcano erupts, lava can destroy whole towns.
5. The last time Mount Vesuvius erupted was in 1944.
6. Surtsey is an island that was formed by a submarine volcano.
7. If a supervolcano erupted, our climate would change.
8. Mudflow volcanoes are the only ones that are not dangerous.
