Parietal lobe and frontal lobe
Although earthquakes often occur before a volcanic eruption, they are not the cause. The earthquakes are the result of magma (molten rock) moving underground leading up to an eruption. A few volcanic eruptions are thought to have been triggered or initiated by earthquakes, but this is not the typical case.
Answer:
Calcium is a chemical element with the symbol Ca and atomic number 20.
Explanation: