1. Lava flowing from the mouth of the volcano to the different areas at different distances depending on its volume, which earth subsystem is first to be affected?
A. Hydrosphere
B. Geosphere
C. Biosphere
D. Atmosphere

2. Sulfur dioxide is the poisonous gas released after its massive explosive eruption, which subsystem is mostly affected?
A. Atmosphere
B. Biosphere
C. Hydrosphere
D. Geosphere

3. Which earth subsystem is involved it fissure and earthquakes happens after huge explosion?
A. Atmosphere
B. Hydrosphere
C. Geosphere
D. Biosphere​