Final answer:
Artemisia Gentileschi used tenebrism and contrasting values to draw attention to the blood spurting from Holofernes' neck in her painting Judith Decapitating Holofernes.
Step-by-step explanation:
Artemisia Gentileschi used tenebrism and contrasting values in her painting Judith Decapitating Holofernes to draw our attention to the blood spurting from Holofernes' neck. Tenebrism is an artistic technique popularized by Caravaggio and his followers, characterized by very pronounced and dramatic light contrast. By employing tenebrism, Gentileschi created a high contrast between the limited light and the darkness, which intensified the drama and tension of the scene. This technique allowed the blood spurting from Holofernes' neck to stand out prominently.