In the early 1800’s, the railroad needed an ample supply of (a) coal or (b) wood

a.coal

they used coal

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the answer that best explains what happened to george washington at fort necessity, pennsylvania is : washington was attacked by the french but was able to negotiate with them to peacefully end fighting. the battle took place on july 3, 1754. the battle is considered as being the start of the french and indian war.