I think your responses to item 6 if you lined up PMV particles end-to-end how many would fit across the diameter of the average human skin cell

what bodys are there orbiting?

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.

if you know your abc's you should be able to get your answer or just use google