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.
A physician recruiting his patients
<span>In deferential vulnerability the authority over the prospective subject is due to informal power relationships rather than formal hierarchies. The power relationship may be based on gender, race, or class inequalities, or they can be inequalities in knowledge (such as in the doctor-patient relationship). Like institutional vulnerability, deferential vulnerability increases the risk of harm that informed consent would be compromised because it is not fully voluntary.</span>
Technology and Government Policy
D it's evident the question is explaining how he's encountered faulty drivers which are teens
Intruding thoughts that occur again and again are called obsession. Repetitive, ritualistic behaviors are called compulsions. Obsessive-compulsive disorder (OCD) is neurotic and anxiety disorder. People with Obsessive-compulsive disorder have irrational fears and constant anxiety. This disorder involve that a fear and anxiety are associated whit recurrent, unwanted and unpleasant thoughts (obsessions). For many people with OCD, the only solution for avoid this thoughts is to make ritual-reduce fear (compulsive act).
