Question 3 Which of the following is NOT one of the ways that humans upset the balance in an
ecosystem?
1.by bringing in harmful plants
2.by destroying too many trees
3.by studying plants and animals
4.by using pesticides

Peggy feels sorry for smokers who have lung cancer because she believes they were duped by tobacco companies to develop a deadly addiction and are therefore not responsible for their disease. when asked to donate money to support lung cancer research, peggy gives generously. peggy’s prosocial behavior can best be explained by the arousal: cost-reward model. the negative state relief model. a norm of equity. attributions of responsibility.