Final answer:
The author conveys Dev's embarrassment through Megan's dialogue and his physical actions.
Step-by-step explanation:
The author conveys a sense of embarrassment for Dev through Megan's dialogue and Dev's physical actions. Megan's exclamation, "Dev! I thought you were kidding when you said you would wear that!" indicates that Dev's choice of attire is not socially acceptable and causes embarrassment. Furthermore, Dev's actions of entering the stage dressed in a powder-blue ruffled tuxedo and the description of Megan's reaction as "horror" emphasize his embarrassment.