Handing someone the important task says “I trust you” louder than any compliment.

Praise is easy to give and easy to discount, because words cost the speaker nothing and everyone knows it. Responsibility is expensive, since you carry the risk if it goes badly, and that is exactly why receiving it changes how a person sees themselves. It is also the only route by which anyone becomes ready for the next thing.

Give away something that genuinely matters this week rather than something safe. Say why you chose that person. Then resist checking twice, because taking it back halfway undoes the entire message.