How does the respiratory system work at the tissue level

my answer was deleted recently for me say i didnt know how to anwser it but i was just trying to explain i didnt really have teh right words for it and id try my best  the went me down two ranks you are a very rude person and shouldnt delete peaples answers for notin anyway pal  im talking to a mod about this >:(

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

i believe the answer is a or 1