Which of the following is not an example of effective group participation?

listening to opposing viewpoints

sharing your perspective

moving away from the topic

giving and receiving criticism

The answer is: moving away from the topic.

Group participation, like any other form of dialogue, debate or discussion, should attempt to be as focused as possible in order for it to be constructive and carry as much meaning as the discussion requires it; that is to say, when participating in a group, moving away from the topic is never a good participating technique since it deviates from the main topic and creates argumentation lines that are not related to said topic.

not concrete, existing in thought or as an idea but not having a physical or concrete existence

i feel like it is actually b.