What are some products that you personally use that are refined from metal ore?

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

answer is slate

hope this

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.