- Volcano eruption is when volcano deposits lava to the earth 's surface
- New land can be formed by lava cooling after an volcano eruption
- Therefore, volcano eruption can form a new land

- Volcano eruption can form a new land
- A volcanic eruption is a kind of quick process
- So, volcano eruption is a quick process to form land

- "Placing a blanket on fire cuts off the oxygen " is not a useful statement here

Therefore, volcano eruption is a quick process to form land
Q: Which is a quick process that can form new land near an ocean?
Context:
- A volcanic eruption is a kind of quick process 
- Volcano eruption is when volcano deposits lava to the earth 's surface 
- New land can be formed by lava cooling after an volcano eruption
- Placing a blanket on fire cuts off the oxygen 