I think it's "Pictures display information when written instructions are more complicated". Personally I believe it's just a majorly confusing way of saying: when the written instructions are too complicated they use pictures as well.
The three allusions Ralph Waldo Emerson makes are Francis Bacon, Irish dayworkers, Coeur-de Lions.
In the beginning of the "Society and Solitude" he talks about the capital and mentions how it is the want of animals spirits and in this excerpt appears all these three.
"The capital defect of cold, arid natures is the want of animal spirits. They seem a power incredible, as if God should raise the dead. The recluse witnesses what others perform by their aid, with a kind of fear. It is as much out of his possibility as the prowess of <em>Coeur-de-Lion</em>, or an <em>Irishman's day's-work</em> on the railroad. [...] As <em>Bacon</em> said of manners, “To obtain them, it only needs not to despise them,"
Answer:
As emperor, Justinian made great reforms in the areas of law, urban development, and conquest. His Justinian Code curbed bureaucratic corruption in the empire for centuries. Theodora was a partner in these reforms and convinced Justinian to reform the roles and responsibilities of women in the empire.
One answer would be students find it difficult to relate to poems that were written long ago, Teachers use it with other works of literature may be one, and understanding the meaning and structure of a poem is challenging.