What process forms a metamorphic rock

They are created by the physical/chemical alteration by heat and pressure of an existing igneous or sedimentary material into a more denser form.  (In other words, they are igneous or sedimentary rocks that have undergone changes as a result of extreme pressure and heat.)

its 42

i say its d?

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.