Shield volcanoes are made mostly of:
AQuartz
BGypsum
CBasalt
DMarble
Answer & Solution
Correct answer: C. Basalt
1. Their lava is very fluid and spreads far.
2. That is why these volcanoes are not steep.
3. They are made mostly of basalt.
4. So the answer is basalt.
_Source: NCERT Class 11 Geography, Ch 3 'Interior of the Earth'_
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