Question

volcanoes quick check
which of these is a feature of most shield volcanoes? (1 point)
○ broad base
○ violent eruptions
○ thick lava
○ steep sides

Explanation:

To determine the feature of most shield volcanoes, we analyze each option:

• "Broad base": Shield volcanoes are formed by low - viscosity, runny lava that spreads out over a large area, resulting in a broad, gently sloping base.
• "Violent eruptions": Shield volcanoes typically have quiet eruptions as their lava is fluid and doesn't trap much gas, so violent eruptions are not a feature.
• "Thick lava": Shield volcanoes have thin (low - viscosity) lava that can flow long distances, not thick lava.
• "Steep sides": Due to the fluid lava spreading out, shield volcanoes have gentle slopes, not steep sides.

So the correct feature is a broad base.

Answer:

A. broad base