Final answer:
In Siqueiros's Echo of a Scream, vibrant colors and symbolic imagery are used to intensify the vision of the effect of poverty on the youth.
Step-by-step explanation:
Siqueiros uses vibrant colors and symbolic imagery to intensify the vision of the effect of poverty on the youth in his painting Echo of a Scream. The brown-muted tones of the painting represent the overall bleakness of poverty, while the pop of bright red color on a child's body represents the stark contrast and the pain and suffering caused by poverty. The twisted metal and implements of warfare in the painting create a war zone-like atmosphere, further highlighting the harsh consequences of poverty on the youth.