How would you characterize someone who appears "crestfallen"?

When someone is described as "crestfallen," it conveys a sense of deep disappointment or dejection. The term arises from the imagery of a crestfallen bird, whose head hangs low, symbolizing a loss of spirit or hope. This emotional state reflects feelings of discouragement and being downcast, which aligns directly with the correct choice.

The other choices suggest positive or indifferent emotions, such as excitement or relaxation, which do not fit the melancholic and subdued nature associated with being crestfallen. Therefore, the characterization of someone who is crestfallen as discouraged and downcast provides a precise understanding of their emotional state.