an artwork (from any time period) and explain what role you think it plays in

Q1 Describe how  the development of photography impact social consciousness and awareness in the arts; cite one example. Q2 Give an example of an art work that was meant to protest war or social injustice, and describe how it did so. Q3 tell us a) what you think art is and how you would define it, and b) why art is important to society and purpose it serves. Include at least one specific example of an artwork (from any time period) and explain what role you think it plays in society today.