Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> When the molten material of the mantle cools down, it can form _____________.

• A. rivers
• B. igneous rocks
• C. oceans
• D. agriculture fields

Answer 1

The correct option is B igneous rocks

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> When the molten material of the mantle cools down, it can form hard rocks, called igneous rocks. Volcanoes cause severe damages and destruction, but they also give rise to new rocks.