Answer:
igneous rocks are made from molten,and therefore rarely have fossils in them.Metamorphic rocks are squished,put under pressure,and get heated to the extreme,so it's very rare for fossils to survive in these conditions.
A. Oxygen ion
I am not sure but that's the right one I think. If I am wrong then I am sorry
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Titanium tribromide, titanium (III) bromide, or titanous bromide.
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