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: an increase in quantity demanded as prices decrease.
<em>Hope this helps!</em>
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<em>- Martiinez/QuezoMartiinez <3</em>
Answer:
Mechanical warning on the all the way down box and Chemical warning goes on the all the way up box
Explanation:
I saw the zoom icon down there were you in class? Lol
Explanation:
<h3>Lithium is widely distributed but does not occur in nature in its free form. Because of its reactivity, it is always found bound with one or more other elements or compounds. ... The metal is separated from other elements in igneous rocks, and is also extracted from the water of mineral springs.</h3>