Short Answer 
Many countries, such as South Africa, Nigeria, and Denmark, are free from volcanoes due to their geological positioning away from tectonic plate boundaries and hot spots. In contrast, the ‘Ring of Fire’ in the Pacific is known for high volcanic activity, resulting from significant tectonic interactions.
Step 1: Identify Countries Without Volcanoes
Many countries around the world are free from volcanoes. Some notable examples include:
- South Africa
- Nigeria
- Zimbabwe
- Malawi
- Djibouti
- Somalia
- Algeria
- Morocco
- Tunisia
- Liberia
- Denmark
- Norway
- Wales
- Finland
- Sweden
- Ireland
Step 2: Understand the Geological Reasons
The absence of volcanoes in these countries can be explained by their locations. They are typically not situated above or near:
- Collision lines of tectonic plates
- Submersion lines between tectonic plates
- Hot spots where volcanic activity can occur
Without these geological features, volcanic activity cannot develop in these regions.
Step 3: Recognize the ‘Ring of Fire’
The most famous region known for its active volcanoes is the ‘Ring of Fire’ located in the Pacific Ocean. This area is characterized by:
- A high frequency of earthquakes
- Numerous active volcanoes
- Plate tectonic activity
Countries within this zone experience significant volcanic activity, unlike those without volcanoes.