"Agitate" means to disturb, excite, or make anxious. The opposite or antonym would be "Soothe," which means to calm or pacify. Therefore, option (D) Soothe is the most suitable antonym in this context.

"Praise" involves expressing approval or admiration, while "Condemn" involves expressing strong disapproval or criticism. Therefore, option (B) Condemn is the most suitable antonym in this context.

"Moil" means to work hard or toil, so the opposite or antonym would be "Discourage," which implies dissuading from effort or work. Therefore, option (C) Discourage is the most suitable antonym in this context.

"Flabby" describes something that is soft, loose, or lacking firmness. Therefore, "Firm" is the opposite, indicating solidity or a lack of flabbiness.