Read the passage. Candy bars were invented in 1847. The first chocolate bar was made in Britain by Joseph Fry and his son. They made a paste of cocoa powder and sugar, then pressed it into a rectangular-shaped bar. Two years later, John Cadbury introduced his own brand of chocolate bar. Fry and Cadbury became a team and became great chocolate makers. What purpose does the medium achieve? The text gives the reader details that suggest how chocolate bars smell. The text includes facts to help the reader understand the history of the chocolate bar. The text provides descriptions that help the reader picture how the chocolate bar has changed. The text presents details that help the reader see how the taste of the chocolate bar has improved.