Examine the two paintings below depicting famous events from american history. the first image, painted in 1940, shows the signing of the u. s. constitution in 1787. the second, painted in 1836, shows the american victory at the battle of yorktown in 1781. which of these paintings should be considered a secondary source?

The answer is Both paintings are secondary sources 

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.