There's no sample answers but i'll list some...
Majority Rule
Voting
Freedom of Religion
Individualism
etc.
Anne Hutchinson, was a spiritual Puritan leader who has a strong group of followers due to her charismatic aura and teachings. The wife of William Hutchinson and a mother of fifteen children became a big threat to the English puritan leaders that she was exiled and later excommunicated.
The answer is: his study does not qualify as an experiment. For the study to be an experiment, Dr. Kline would have to manipulate the independent variable in a group (for example, apply a certain treatment) and also have a control group to which he doesn’t apply such treatment.
In this case, the study is an observational study because he only observed the subjects that were in the zoo that morning and measured the variable of his interest, that is the environmental attitude of the visitors, he did not apply a certain treatment to the group nor manipulate any variable.