Rupturing of an artery is dangerous, why?

The blood pressure could drain all blood in your body in a span of few minutes.

Explanation:

Since heart pumps blood only though the atery, if any crucial arteries get rupted during surgeries, it could drain all your blood in your body in a few minutes.

b.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.