Answer:
The correct answer is : Panel discussion.
Explanation:
A panel discussion is a public exchange of ideas often used to deepen into politics and issues that affect communities. This type of gathering is characterized by the fact that it gives not only experts but also audience members the chance to discuss a particular topic.
In this sense, if a group of environmentalists is planning a presentation hoping to convince their audience to start recycling and to use public transportation more often, as it is stated on the example provided, it would be advisable using, rather than a forum or a symposium, a panel discussion since, as it was stated before, it would give the chance to community members to participate in sharing their own experiences of recycling or using public transportation.
