Here's a breakdown:

* Cone-shaped: Volcanoes often have a cone-shaped structure due to the accumulation of erupted material (lava, ash, rocks) over time.

* Spewing out lava or gas: This is the defining characteristic of a volcano. The eruption of molten rock (lava) and hot gases is what makes a volcano active.

Let me know if you'd like to learn more about volcanoes!