Jenna spent her weekend cleaning a nearby beach as part of a volunteer group. at the end of a very long, hot weekend, the leader of the group asked her to come volunteer every weekend for the rest of the year. jenna is more likely to agree to the second request now, after spending a weekend cleaning the beach, because of

foot-in-the door technique

Explanation:

The foot-in-the door technique assumes the agreement to smaller request increases the likelihood or the chances of agreement to another request, larger than the previous request.

So, in the initial stage, a small request is made and the agreement of the person to this it becomes harder for them refusing a greater request.

Thus, In case of Jenna, she initially agreed for volunteering the work of cleaning of the beach and after the request for a greater work was made  to her for her she agreed to it.

chavez's example shows that nonviolent protest can work well. it shows that one nonviolent man can stop a mob, which proves chavez's point and persuades people to protest nonviolently.