An observational study tries to gather information without disturbing the scene they are observing. Observational study
Thus we have an observational study that will compare the proportions of two samples orienting from two independent populations.
Note: The exercise prompt mentions that they "survey" random samples. However, this does not mean that the study is a survey, because the definition of a survey is "a general view, examination, or description of someone or something", thus it is possible that the data is collected by observing people and thus also WITHOUT specifically asking people questions, which means that the study is not necessarily a survey.