Source : http://www.designzzz.com/wp-content/uploads/2010/05/save_water_4_by_serso.jpg
Image : a tap that is closed with a plant growing in an extension of the tap, in a blue background.
Linguistic feature : "Save water...Save life" This text is trying to convey the message that saving water will help to save lives.
Typographical feature : the font is the same size, and small to draw attention to the image first
Layout : Since there is only one text, the attention will be drawn to it
Purpose : To tell the audience to save water
Audience : General public
Context : People who might be using excess water