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the formation of new areeas of oceanic crust which occurs through the magma at ridges and its subsequent outward movement on either side</span>
Answer:
(3) control group
Explanation:
Control group refers to the group of standar individuals who do not receive treatment by researchers, so that their results are compared with the experiential group which did receive treatment.
In the experiment about pulse rate according to music, the student does not include the average pulse rate of the control group that was not exposed to different types of music.
Answer:
A Rack for hot food and a dish towel
Explanation:
One that evoked the unspoken fears of humans