Answer:
An observational study, not an experiment.
Explanation:
Researchers investigated reasons why different species of birds begin to sing at different times of the morning. They captured and examined birds of 57 species at different sites around England. They reported that there is a strong relationship between the diameter of a bird's eye and the time it starts singing in the morning: birds with larger eyes tend to start singing earlier.This is an example of An observational study, not an experiment.
<span>Pax Romana is the peace that existed between nationalities within the Roman Empire.</span>
I believe the answer is: Defeated
The defeated group in hetherington's term refers to the people who are failing in maintaining the marriage commitment with their partner.
The problems that caused the failure mostly come from either emotional issues or personal issues between the couples.
Answer:
c. voluntary participation
Explanation:
In the context, Professor Smith conducts a research in the dating behaviors of her college students. She wishes to track the students dating behavior through their entire college careers. So on her first class she explains her research work to the students and does the survey during the class.
Thus in this case, the research has an effect on the voluntary participation of the college students as all the students present in her class was given the survey to complete and they were not asked for their voluntary participation in he survey.
Hence the correct option is (c).
