10. The heart is a hollow organ with walls made mainly of muscle and works as a pump to push blood around the twin circuits of the

circulatory system

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the correct answer is d. in john paston's letter written friday, 14, 1476, he expresses his fear that he may have to go to war.

indeed, although the black death was ravaging europe, the pastons were relatively safe from it due to their social status as they were part of the landed gentry. it is clear that the vast majority of the victims of the pandemic were the poor. the reason why he is weary of having to go to war is because at the particular time england was also devastated by the war of the roses and paston, being a courtesan was inevitably involved.

c to inform it is mainly to tell a person about a passage or short story. or a short summary

i would say the answer is b.) workforce to me because it seams the most logical but i'm not sure.