Answer:
still talking the test but it should be D women's rights
Explanation:
Answer:
A
Explanation:
Many Chinese cities have dangerous levels of air pollution
Answer:
An observational study.
Explanation:
Observational studies are those studies in which the researchers note the effects of risks factor, diagnostic test, or treatment without interrupting in it by changing anything. It is an investigative study that aims at distinguishing the effects caused by the treatment.
<u>In the given case, the researcher has used the observational study method to identify the effects of exercise on reducing the cholesterol level. He divided the people into two groups with 50 each. The research was performed without an awareness of these people as well as the technician measuring the cholesterol level. Thus it exemplifies an observational study</u>.
So, the correct answer is the observational study.
Answer:
impair;enhance.
Explanation:
the blank will be filled with impair;enhance.
When undertaking difficult task the presence of others degrade or weakens the performance of the people.
And when undertaking the simple task the presence of other enhance the performance of the group.
This is because difficult work require more concentration and presence of other person affect the efficiency of the person.
