Final answer:
The principles of design in Paul Delaroche's The Young Martyr are contrast and proportion.
Step-by-step explanation:
In Paul Delaroche's painting The Young Martyr, two principles of design are evident: contrast and proportion. Contrast is seen in the juxtaposition of light and dark areas in the painting. The figure of the young martyr is depicted in a brightly lit area, standing out against the dark background. This creates a visual impact and emphasizes the importance of the figure in the composition. Proportion is demonstrated in the depiction of the figure's body. The young martyr is shown in a graceful and idealized manner, with elongated limbs and a harmonious overall form. This attention to proportion adds to the beauty and balance of the painting.