The features of most stratovolcanoes include:
- Steep sides near the top with thick, slow-moving lava
- Sudden, violent eruptions
Stratovolcanoes are characterized by their steep profiles and are typically associated with explosive eruptions due to the viscosity of their magma, which is often andesitic to rhyolitic in composition. Therefore, the correct response would be:
- Steep sides near the top with thick, slow-moving lava
- Sudden, violent eruptions
Other options mention gentle slopes or quiet eruptions, which are more characteristic of shield volcanoes, not stratovolcanoes.