The correct answer is 3. Explanation & Key Takeaways: • Acid Lava Cone, Basic Lava Cone, Cinder Cone, Mixed Cone are the Relief Features created by the volcanic eruption. Important Notes: • Cinder Cone Volcanoes • Cinders are extrusive igneous rocks. • A more modern name for cinder is Scoria. • These are small volcanoes. • These volcanoes consist almost entirely of loose, grainy cinders and almost no lava. • They have very steep sides and usually have a small crater on top. • Composite Volcanoes (Mixed Cone) • Cone-shaped with moderately steep sides and sometimes have small craters in their summits. • Volcanologists call these “strato-” or composite volcanoes because they consist of layers of solid lava flows mixed with layers of sand- or gravel-like volcanic rock called cinders or volcanic ash. • They are characterized by the eruption of cooler and more viscous lavas than basalt. • These volcanoes often result in explosive eruptions. • Along with lava, large quantities of pyroclastic materials and ashes find their way to the ground. • This material accumulates in the vicinity of the vent openings and leads to the formation of layers, and this makes the mount appear as composite volcanoes. • Shield Type Volcanoes (Basic Lava Cone) • If you were to fly over the top of a shield volcano, it would resemble a warrior’s shield, hence the name. • The Hawaiian volcanoes are the most familiar examples. • These volcanoes are mostly made up of basaltic lava (very fluid). • These volcanoes are mostly made up of basalt (less viscous), a type of lava that is very fluid when erupted so volcanoes are not steep. • Shield volcanoes have low slopes and consist almost entirely of frozen lavas. • They become explosive if somehow water gets into the vent; otherwise, they are less explosive.