Final answer:
Childhood experiences are key themes in the works of Lorna Simpson, Oswaldo Guayasamin, and Louise Bourgeois, influencing their styles and messages in the art they produced.
Step-by-step explanation:
Childhood experiences significantly influence the thematic foundation of an artist's work. Artists such as Lorna Simpson, Oswaldo Guayasamin, and Louise Bourgeois have incorporated the essence of their early life events and environments into their artworks, shaping their styles, subjects, and messages. For example, Lorna Simpson's conceptual photography, Guayasamin's emotional portrayal of South American Indigenous struggles, and Bourgeois' profound use of personal childhood drama and trauma all exemplify how their formative years have been channels for artistic expression.