Genetic variety i believe.
Answer:
it's called I guess high blood pressure
Explanation:
due to a sudden shock or heavy loads carry that weaken the human body
<span>Before an eruption, scientists look for gases and changes in the volcanoes shape, before an eruption the number and intensity of small earthquakes increases, this is caused by the movement of magma, prior to the eruption. Magma forms in the mantle and is a result of high temperature and low pressure.</span>