In highly seismic areas, what material should be used for construction of houses.

Explanation

**Step-by-Step Solution:**

1. **Understanding Seismic Areas**: Seismic areas are regions that are prone to earthquakes. In these areas, buildings must be designed to withstand the forces generated during an earthquake.

2. **Choosing Materials**: In highly seismic areas, it is advisable to use lighter construction materials. Heavy materials can increase the risk of structural failure during an earthquake.

3. **Recommended Materials**: The best materials for construction in seismic areas include wood, mud, and timber. These materials are lighter compared to traditional heavy construction materials like concrete and steel.

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