1. Using the "Social Origins" article, describe two significant transitions in the development of prosocial behavior in children from birth to four years of age. 2. Using the "Need to Contribute During Adolescence" article, describe a significant change in adolescent helping behavior and at least one reason why that change occurs. 3. Explain Greta Thunberg's activism in terms of the motives discussed in the "Adolescence" article. (You probably know who she is, but if not, look her up.)