Answer: Finding volunteers to work at a charity event
Step-by-step explanation:
Persuasion simply means convincing someone to do a particular thing. From the options given, the option that will use persuasion is finding volunteers to work at a charity event. In such case, tis isn't part of the job roles of the workers and should be persuaded before they can go as they'll go when they realize that it's beneficial in one way or the other.
For other options, a direct strategy is utilized as the purpose is clear and immediately started.