How do aliens communicate?

In the ninteenth century,why was it more nessesary for art to provide accyrate represemtations of life and objects

Silverpoint is a. a technique using the blackish residue of impure carbon obtained by removing water from animal and vegetation substances. b. a technique involving the use of a metal point, and a thin silver wire, popular in the 14th and 15th centuries. c. a printmaking technique born from crayon manner that imitates the appearance of chalk lines. d. a technique used since the 16th century involving a stick filled with either colored or black graphite, a heated mixture of carbon and clay

When was bauhaus founded ? 1436 1861 1888 1919 1929