Provide four points to indicate how radiations found at home can also be good for one's health

Magma is outside the volcano  and lava is inside the volcano. 

Csaudi arabia and wish u us: )

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

The answer is d., a mountain.